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Master requirements guide
Booster Seat Requirements: Complete Guide by State, Age, Height & Weight (2026)
Most states require children to use a booster seat until a minimum age or size threshold, but exact laws vary by state.
Quick answer
Most children need a booster until the seat belt fits correctly
Most U.S. booster seat requirements come from state law, not one single federal age rule. Many states use age 8, 4 feet 9 inches, or both as key thresholds, but safety guidance focuses on how the vehicle belt actually fits the child. A booster is still useful when the lap belt rides on the stomach, the shoulder belt cuts across the neck or face, or the child cannot stay seated correctly for the full ride.
If you searched for weight booster seat requirements, the practical answer is to check three places: your state law, the forward-facing harness limit the child is leaving, and the booster manufacturer's minimum and maximum weight limits. Then keep using a booster until the vehicle lap-and-shoulder belt fits without help. NHTSA, CDC, and AAP guidance all point parents toward age, size, manufacturer limits, and belt fit rather than a birthday alone.
If your child still needs a booster, a backless model such as the Graco TurboBooster 2.0 Backless Booster Car Seat is the simplest way to meet the rule once they have vehicle head support (a lower-cost backless option works too); younger children often do better in a high-back booster. Not sure which? Use the seat finder, or run the 5-step belt fit test before dropping the booster. Shopping links — see our affiliate disclosure.
How to use this guide
Legal minimums and safety best practice are not the same thing
New to booster seats entirely? Start with what a booster seat is for the basic definition and how it differs from a harnessed car seat, then come back here for the full requirements. A booster seat requirements page has to answer two different questions. The first question is legal: what does my state require? The second question is practical and safety-focused: what keeps my child properly restrained in my actual vehicle today? Those answers often overlap, but they are not identical.
State laws are minimum rules. They tell you when a driver can be ticketed for not using a child restraint, booster seat, or safety belt. Safety guidance is broader. It considers injury prevention, child development, belt geometry, vehicle seat shape, and whether a child can sit correctly for the entire trip. That is why a state may legally allow a seat belt at age 6 or 8 while NHTSA, CDC, or AAP guidance still suggests a booster until the belt fits correctly.
This guide uses official safety sources first, then state law sources. NHTSA is the main federal consumer source for car seats and booster seats. CDC provides public-health injury-prevention guidance and statistics. AAP/HealthyChildren gives pediatric safety guidance for families. eCFR provides federal regulatory definitions under FMVSS 213. GHSA and Safe Kids are useful state-law indexes, but individual state pages should still be checked against official state agency or statute pages before publication.
Federal vs state
Federal standards regulate seats; states set everyday legal requirements
Federal rules matter because they define and regulate child restraint systems. Under 49 CFR 571.213, a booster seat can be a backless child restraint system or a belt-positioning seat. A belt-positioning seat is designed to improve the fit of a Type II belt system, which means a lap-and-shoulder belt. That definition is important because a booster is not simply a cushion that makes a child taller. It is a restraint-positioning device that must work with the vehicle belt and the manufacturer's instructions.
State law matters because it decides when a child must be in a child restraint system, booster seat, or safety belt while riding in a vehicle. A driver checking Texas booster seat law, Oklahoma booster seat law, Mississippi booster seat law, Florida booster seat law, California booster seat law, New York booster seat law, or Illinois booster seat law is not answering the same legal question. Some states write requirements mainly by age. Others include height exceptions. Some mention rear-facing rules. Some set fines directly in the statute; others leave total ticket cost to fees, court costs, or local penalty assessments.
Age
Booster seat age requirements
Age is the easiest number to remember, which is why so many parents search for booster seat age requirements. It is also the easiest number to misuse. A child who turns 8 may still be too small for the adult belt. A child who is 5 may meet the minimum allowed by a state law but still be better protected in a forward-facing car seat with a harness. A child who is mature enough to sit correctly on one trip may slouch, lean, or put the shoulder belt behind the back on a longer trip.
NHTSA's stage guidance generally puts many 4- to 7-year-olds in a forward-facing car seat with harness and tether until they reach the top height or weight limit allowed by the seat manufacturer. After that, the next stage is a booster in the back seat. For many 8- to 12-year-olds, NHTSA points to booster use until the seat belt fits properly. CDC adds a useful reality check: proper belt fit usually occurs around ages 9 to 12. AAP/HealthyChildren similarly notes that many children do not fit most vehicle belts without a booster until roughly ages 10 to 12.
The safe way to write and use an age requirement is therefore: check your state law, then check the child, seat, vehicle, and belt fit. If a state says "under 8," that does not mean every 8-year-old is ready for only a seat belt. It means the legal minimum has changed. The safety question remains open until the lap belt and shoulder belt fit correctly without a booster.
Height
Booster seat height requirements
Height is often a better clue than age because adult seat belts are designed around adult bodies. The common benchmark is 4 feet 9 inches, or 57 inches. California booster seat law, Oklahoma booster seat law, and Texas all use 4'9" in their legal or legal-exception language. New York DMV uses 4'9" as a recommendation point for children who are already 8. Illinois booster seat law and safety materials also point families toward booster use until children are close to 4'9".
Still, height is not the finish line by itself. A 57-inch child can sit differently in different vehicles. The back seat of a compact car, pickup, SUV, rideshare vehicle, or rental car may position the belt differently. A child also needs enough leg length to sit with the back against the vehicle seat and knees bending at the edge. If the child scoots forward to bend at the knees, the lap belt can ride up onto the abdomen, which is exactly what a booster is meant to prevent.
The best height rule is: use 4'9" as a warning light, then use the belt fit test as the decision. The lap belt should lie low across the hips or upper thighs, not the stomach. The shoulder belt should cross the middle of the shoulder and chest, not the neck, face, arm, or back. If either belt is out of position, a booster may still be needed even when the child seems tall for their age.
Weight
Booster seat weight requirements
Weight requirements are the most misunderstood part of booster seat requirements. Parents often search for one national weight number, but there is no single U.S. booster seat weight rule that applies everywhere. Instead, weight shows up in three places: state law, the child restraint manufacturer's instructions, and the car seat stage the child is leaving.
Manufacturer limits are especially important. A child should not leave a forward-facing harness just because they meet a state minimum age. They should remain in that harness until they reach the top height or weight limit allowed by the seat manufacturer, unless the manual gives a different instruction. Once a child moves to a booster, the booster itself also has minimum and maximum weight limits. Those product limits matter because a booster is tested and labeled for a specific use range.
Weight can also interact with rear-facing rules. California and Illinois, for example, both include rear-facing exceptions tied to 40 pounds or 40 inches for children under 2. That does not create a universal booster weight threshold. It simply shows why the label and manual matter at every stage. For Florida families, the Florida booster seat requirements page is especially important because the statute is weaker than best-practice guidance. For Illinois families, use the Illinois booster seat requirements page together with the seat label and manual.
State comparison
Booster seat requirements by state
This table now covers all 50 states. California booster seat law, Texas, Louisiana, Oklahoma booster seat law, Mississippi booster seat law, Nebraska, Florida booster seat law, New York, Illinois booster seat law, and Arkansas booster seat law have official state-source or statute verification; the remaining states use GHSA/Safe Kids index sources and are marked for official state-source follow-up.
| State | Age rule | Height / weight | Fine | Verified | Page |
|---|---|---|---|---|---|
| Alabama | Rear-facing until 1 or 20 lb; forward-facing until 5 or 40 lb; booster until age 6; seat belt required from age 6 through 14. | Height: No statutory height threshold; Alabama's rule is written entirely by age and weight. Weight: 20 lb ends the rear-facing minimum; 40 lb ends the forward-facing-harness minimum. Booster and seat belt stages are set by age only. | Alabama Code 32-5-222(d) sets a fine of $25 for each offense, dismissible with no court costs on proof of acquiring an appropriate restraint. A pending bill (HB32, 2026 Regular Session) would raise the fine for repeat violations to $50, $100, and $150, but as of this page's review it had not been enacted. | 2026-09-16 | View Alabama |
| Alaska | Under 1 yr in a rear-facing car seat | Over 1 yr and less than 20 lbs in a rear-facing car seat | 1 yr to under 5 yrs in an appropriate car seat or booster seat | 5 to under 8 yrs and less than 4' 9" (57") tall and less than 65 lbs in an appropriate car seat or booster seat | Drivers must ensure all children under 16 are properly secured in a car seat, booster seat, or seat belt | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Alaska |
| Arizona | Under 5 in a child restraint system; ages 5 through 7 and 4'9" or shorter in a child restraint system, which includes a booster seat. | Height: The statutory exception for ages 5 through 7 is taller than 4 feet 9 inches, which ends the restraint requirement early. Weight: No statutory weight threshold; the restraint manufacturer's limits govern which seat is appropriate at each stage. | Arizona Revised Statutes 28-907 sets a civil penalty of $50, waived if the driver shows proof the vehicle was subsequently equipped with a child restraint system. | 2026-09-15 | View Arizona |
| Arkansas | Under 6 and under 60 lb must use a child passenger safety seat; under 15 must be properly restrained. | Height: No statutory booster height threshold; use the seat-belt fit test and 4'9" safety benchmark before leaving a booster. Weight: Under 60 lb and under age 6 must use a child passenger safety seat; at least 60 lb may use a properly secured safety belt under state law. | Arkansas Code 27-34-103 lists $25 to $100 for violations; Safe Kids lists $100 as the maximum first car seat violation fine. | 2026-09-06 | View Arkansas |
| California | Under 8 in an appropriate child passenger restraint system; ages 8 through 15 must be in an appropriate restraint or safety belt. | Height: A child under 8 who is at least 4'9" may use a safety belt instead of a child restraint system. Weight: Under 2 must ride rear-facing unless 40+ lb or 40+ inches; otherwise follow manufacturer height/weight limits. | California Vehicle Code 27360.6 lists a $100 base fine for a first conviction under Section 27360 or 27360.5 and $250 for a second or subsequent conviction; penalty assessments and fees may raise the total. | 2026-09-07 | View California |
| Colorado | Under 2 yr and under 40 lbs in rear-facing child restraint | More than 40 lbs may ride forward-facing; 2–3 years and at least 20 pounds may ride in either a rear or forward-facing child restraint | 4-8 years and at least 40 lbs in child restraint or booster (effective 01/01/25) | 8 and younger must be in the rear seat if available (effective 01/01/25) | Height: No height threshold listed in GHSA summary. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Colorado |
| Connecticut | Rear-facing under 2 or 30 lb; forward-facing harness under 5 or 40 lb; harness or booster under 8 or 60 lb; seat belt or restraint from 8/60 lb through 15. | Height: No statutory height threshold; Connecticut's tiers are set by age and weight together, using whichever keeps the child in the more protective tier longer. Weight: 30 lb, 40 lb, and 60 lb are the three weight thresholds; a child stays in the more protective tier until both the age and weight conditions for the next tier are met. | Connecticut General Statutes 14-100a(d)(5): a first violation is an infraction (a $92 fee under the state's standard infraction schedule); a second violation is fined up to $199; a third or later violation is a class A misdemeanor. The court may remit a first-time fine if the driver shows proof of acquiring a restraint or booster within 14 days. | 2026-09-16 | View Connecticut |
| Delaware | Under 2 yrs and under 30 lbs in rear-facing car seat | Under 4 yrs and under 40 lbs in a harnessed child safety seat | Under 16 in booster seat until reaching the maximum height or weight limit | 5'5" or less and under 12 yrs in rear seat | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Delaware |
| Florida | Children 5 and younger must use a crash-tested, federally approved child restraint device. | Height: No booster-specific height threshold in the main child-restraint statute. Weight: No booster-specific weight threshold in the main child-restraint statute. | Florida Statute 316.613 makes a violation a moving violation with 3 points. The base fine under Statute 318.18(3)(a) is $60; county court costs and surcharges are added on top, and a court may waive the fine and points after an approved child restraint safety program. | 2026-09-12 | View Florida |
| Georgia | Under 8 yrs and 57" or shorter in rear seat if available | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Georgia |
| Hawaii | Children under 2 years old must be properly restrained in an approved rear-facing child passenger restraint system. | Children 2 to 4 years old must be properly restrained in an approved rear-facing or forward-facing child passenger restraint system. | Children 4 to 10 years old must be properly restrained in an approved car seat or booster. | Height: No height threshold listed in GHSA summary. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Hawaii |
| Idaho | Under 7 years | Height: No height threshold listed in GHSA summary. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Idaho |
| Illinois | Under 8 must be properly secured in an appropriate child restraint system. | Height: IDOT/ILSOS guidance points to booster use until seat belt fit, often close to 4'9". Weight: Under 2 must be rear-facing unless 40+ lb or 40+ inches; booster use depends on fit and manufacturer limits. | Child Passenger Protection Act lists $75 first violation and $200 second or subsequent violation. | 2026-07-23 | View Illinois |
| Indiana | Under 8 in a child restraint system (car seat or booster) per the manufacturer's instructions; ages 8 through 15 in a child restraint or seat belt. | Height: No statutory booster-exit height; Indiana's rule is age plus manufacturer instructions. Use the 4'9" safety benchmark and belt fit test. Weight: Indiana State Police say a child at least 40 lb may use a booster, and encourage a harness until at least 65 lb; a child over 40 lb may use a lap-only belt when every lap-and-shoulder belt is already used by another child. | Indiana Code 9-19-11-2 makes a violation a Class D infraction with a judgment of up to $25, deposited in the child restraint system account. Court costs are added locally. | 2026-09-12 | View Indiana |
| Iowa | Under 1 yrs and under 20 lbs in rear-facing child seat | 1-5 yrs in child restraint or booster seat | Height: No height threshold listed in GHSA summary. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Iowa |
| Kansas | Under age 4 in an appropriate child restraint | 4-8 years, under 80 pounds or 57” tall in an appropriate child restraint or booster seat | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Kansas |
| Kentucky | 40" or shorter in child restraint 7 yrs or under and between 40" and 57" tall in booster seat | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Kentucky |
| Louisiana | Under 2 rear-facing; at least 2 and outgrown rear-facing limits forward-facing; at least 4 and outgrown forward-facing limits in a belt-positioning booster. | Height: No single booster-exit height in the statute; use the booster manual and belt fit, with the lap-and-shoulder belt positioned correctly. Weight: Louisiana law repeatedly ties transitions to the child reaching the height or weight limit of the current restraint. | Check the current Louisiana statute and local court costs for penalties before relying on a dollar amount. | 2026-09-06 | View Louisiana |
| Maine | Under 2 rear-facing; from 2 and under 55 lb in an internal harness; under 8 and under 57 inches and under 80 lb in a belt-positioning booster; under 18 in a seat belt. | Height: The booster stage ends at 57 inches (4'9"), 80 lb, or the 8th birthday, whichever comes first. Weight: 55 lb moves a child from the harness stage to a booster; 80 lb ends the booster requirement. | 29-A MRS 2081 makes a violation a traffic infraction with a mandatory fine of $50 for a first offense, $125 for a second, and $250 for a third or later offense. The statute says the fine may not be suspended by the court. | 2026-09-13 | View Maine |
| Maryland | Under 8 yrs unless over 57" tall. Rear-facing until age 2 or until they exceed the height/weight specifications of the manufacturer. | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Maryland |
| Massachusetts | Under 8 in a child passenger restraint unless taller than 57 inches; once out of that requirement, a seat belt is required until age 13. | Height: The statutory exception is taller than 57 inches (4'9"), which ends the restraint requirement regardless of age. Weight: No statutory weight threshold; the restraint manufacturer's limits govern which seat and stage is appropriate. | Massachusetts General Laws Chapter 90, Section 7AA sets a fine of not more than $25 for a violation. A separate law, Chapter 90 Section 13A, requires passengers 13 and older to wear a seat belt and is enforced as secondary; Mass.gov does not state that the child restraint law is secondary enforcement. | 2026-09-15 | View Massachusetts |
| Michigan | At least 2 years old in a rear-facing seat or until the child reaches the weight or height limits set by the car seat manufacturer | At least 5 years old in a forward-facing harness seat or until the child reaches the weight or height limits set by the car seat manufacturer | At least 8 years old or 4’9” tall (57”) must be in a booster seat | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Michigan |
| Minnesota | At least 2 yrs in a rear-facing child safety seat until outgrows the seat by height or weight | At least 2 yrs in forward-facing child safety seat if rear-facing seat it too small by height or weight | 4-8 yrs in booster seat if outgrown forward-facing harness seat by height or weight | Under 13 in rear seat if possible * | If a child can be placed in more than one category, then the child must be placed in the more protective category. | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Minnesota |
| Mississippi | Under 4 must use a child passenger restraint device; ages 4 through 6 need a belt-positioning booster if under 57 inches or under 65 lb. | Height: Ages 4 through 6 need a booster if shorter than 57 inches, or 4'9". Weight: Ages 4 through 6 need a booster if under 65 lb; adult safety belt may be used at age 7, 57 inches, or 65 lb under MSDH guidance. | Mississippi Code 63-7-309 lists a $25 penalty for violation of the child passenger restraint requirements. | 2026-09-06 | View Mississippi |
| Missouri | Under 4 or under 40 lb in a child passenger restraint system; ages 4 through 7 weighing at least 40 lb in a child safety seat or booster unless 80 lb or taller than 4'9". | Height: The booster exit height is taller than 4 feet 9 inches; at that height a booster or seat belt is allowed. Weight: 40 lb moves a child out of the under-4 rule; 80 lb moves a child out of the booster requirement. | RSMo 307.179 sets a fine of up to $50 plus court costs. The charge can be dismissed if the driver shows the court proof of buying or getting an appropriate restraint before or at the hearing. | 2026-09-12 | View Missouri |
| Montana | Child restraint required | Under 2 years must ride rear-facing | 2-4 yrs rear-facing or forward-facing in a harnessed seat | 5-8 yrs in a harnessed seat or booster | 9 years and older in a booster seat until outgrown, then seat belt | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Montana |
| Nebraska | Up to age 8 must use a federally approved child safety seat or booster; ages 8 to 18 must use a safety belt or child safety seat. | Height: No single statutory booster-exit height in the state summary; use the seat-belt fit test and 4'9" safety benchmark. Weight: Rear-facing should continue until up to age 2 or until the child reaches the upper weight or height limit allowed by the car seat manufacturer. | Nebraska state safety materials list a $25 fine, court costs, and 1 point for child passenger safety violations. | 2026-09-03 | View Nebraska |
| Nevada | Under 6 yrs of age and less than 57 inches tall | Under 2 yrs must ride in a rear-facing child safety seat in a back seat | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Nevada |
| New Hampshire | 6 yrs and younger who are 57" or shorter | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View New Hampshire |
| New Jersey | Under 2 yrs and under 30 lbs in rear-facing seat | Under 4 yrs and under 40 lbs until height or weight limit reached in child safety seat | Under 8 yrs and shorter than 57" in forward-facing child safety seat or booster seat until height or weight limit reached in rear seat, if available | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View New Jersey |
| New Mexico | Under 1 rear-facing; ages 1-4 or under 40 lb in a restraint device; ages 5-6 or under 60 lb in a booster or restraint; ages 7-12 in a restraint or seat belt. | Height: No statutory height threshold; New Mexico's tiers use age and weight only, and the statute separately defines what counts as a properly fitted seat belt. Weight: 40 lb and 60 lb are the weight alternatives to the age-based tiers; a child under either weight stays in that tier regardless of age. | New Mexico Statutes 66-7-369 sets a penalty assessment of $25 for a violation. | 2026-09-16 | View New Mexico |
| New York | Under 8 must use an appropriate child restraint system; under 2 must ride rear-facing unless seat limits are reached. | Height: NY DMV recommends continuing a child restraint if an 8-year-old is under 4'9". Weight: NY DMV recommends continuing a child restraint if an 8-year-old weighs less than 100 lb; specific seat limits still control use. | Vehicle and Traffic Law 1229-c lists $25 to $100 for relevant violations; additional points/surcharges may apply. | 2026-07-23 | View New York |
| North Carolina | 7 yrs or under and under 80 lbs must be properly secured in a weight-appropriate child restraint | Under 5 and less than 40 lbs must be in the back seat (some exceptions apply) | Height: No height threshold listed in GHSA summary. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View North Carolina |
| North Dakota | Under 8 in an approved child restraint (car seat or booster) unless at least 57 inches tall; ages 8 through 17 in a child restraint or seat belt. | Height: A child under 8 who is at least 57 inches (4'9") tall may use a properly fitted seat belt instead of a child restraint. Weight: No statutory weight threshold; the restraint manufacturer's limits govern. | A violation of North Dakota Century Code 39-21-41.2 carries a $25 fee and no points on the driver's license, according to the North Dakota Highway Patrol classification of offenses and NDDOT Vision Zero. | 2026-09-12 | View North Dakota |
| Ohio | Under 4 or under 40 lb in a child restraint; under 8 and under 4'9" in a booster or child restraint; ages 8 through 14 in a child restraint or seat belt. | Height: A child under 8 who is at least 4'9" tall is outside the booster requirement and falls under the seat belt rule. Weight: 40 lb moves a child out of the under-4 child restraint tier; the booster tier is defined by age and height only. | Ohio Revised Code 4511.81 makes a first violation a minor misdemeanor with a fine of $25 to $75; a second or later violation is a fourth-degree misdemeanor. Fines go to the child highway safety fund. The booster and ages 8-14 rules are secondary enforcement: an officer cannot stop a vehicle solely for those violations. | 2026-09-12 | View Ohio |
| Oklahoma | Under 4 in a car seat with an internal harness; ages 4 through 7 in a car seat or booster unless taller than 4'9". | Height: A child younger than 8 who is taller than 4'9" may use a properly secured seat belt under Oklahoma guidance. Weight: No single statutory booster weight threshold in the Oklahoma summary; use the restraint manufacturer's height and weight limits. | Oklahoma state safety materials explain the child restraint requirement but do not give one reliable statewide ticket total on the pages checked for this guide. Verify any current fine with the statute, court, or local enforcement source before quoting a dollar figure. | 2026-09-07 | View Oklahoma |
| Oregon | Under 2 yrs in a rear-facing child restraint | Properly used child restraint (harness) required until child weight 40 lbs. | Booster required until the child is 8 years old AND the adult seatbelt fits correctly OR the child is 4’9” tall | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Oregon |
| Pennsylvania | Under 2 rear-facing; under 4 in a child passenger restraint; ages 4 through 7 in a seat belt with a booster seat; ages 8 through 17 in a seat belt. | Height: No statutory height threshold; the age-4-through-7 booster requirement is not tied to a height exception the way some states use 4'9". Weight: No statutory weight threshold; follow the restraint manufacturer's height and weight limits for each stage. | 75 Pa.C.S. 4581(b) sets a $75 fine for a child restraint or booster violation, plus court costs. This is a primary-enforcement law. | 2026-09-15 | View Pennsylvania |
| Rhode Island | 2 yrs or under and under 30 lbs in rear-facing child safety seat | 7 yrs and under and shorter than 57" and under 80 lbs in child restraint | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Rhode Island |
| South Carolina | Under 2 yrs or until height or weight limit reached in rear-facing seat | 2-8 yrs in forward-facing child safety seat or in booster seat secured by lap/shoulder belt (lap belt alone is not permissible) | 7 yrs or under in rear seat if available | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View South Carolina |
| South Dakota | Under 5 yrs and under 40 lbs must be properly secured in a child safety seat | Height: No height threshold listed in GHSA summary. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View South Dakota |
| Tennessee | Rear-facing under 1 or 20 lb; forward-facing 1-3 and over 20 lb; belt-positioning booster required ages 4-8 AND under 4'9"; seat belt required 9-12 (or any child through 12 who is 4'9" or taller) and ages 13-15. | Height: 4'9" is the statutory cutoff: a child age 4 through 8 who reaches 4'9" moves out of the booster requirement even before turning 9. Weight: 20 lb ends the mandatory rear-facing stage; the booster stage itself is set by age and height, not weight. | A violation involving a child under 9 (including the booster-age requirement) is a Class C misdemeanor under T.C.A. 55-9-602(c)(1), punishable by up to 30 days and a fine capped at $50 under Tennessee's general misdemeanor sentencing statute (T.C.A. 40-35-111); the statute does not print a specific dollar figure for this age band the way it does for older children. The separate seat-belt requirement for ages 9-15 carries an explicit $50 citation with no added court costs (55-9-602(g)(2)-(3)), but that provision does not apply to the booster-age rule. | 2026-09-20 | View Tennessee |
| Texas | Younger than 8 must be secured in a child passenger safety seat system unless taller than 4'9". | Height: The statutory exception is taller than 4 feet 9 inches. Weight: No single statutory booster weight threshold; use the child safety seat manufacturer's instructions. | Transportation Code 545.412(b) makes a violation a misdemeanor punishable by a fine of not less than $25 and not more than $250. Court costs are added by the local court. | 2026-09-12 | View Texas |
| Utah | 7 yrs or under and under 57" tall | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Utah |
| Vermont | Younger than 2 in a rear-facing child restraint. | Ages 2 through 4 (until 5) in a rear- or forward-facing child restraint. Children must remain in a federally approved forward-facing child restraint with harnesses until the child reaches the weight or height limit as set by the manufacturer. | Ages 5 through 7 (until 8) in a child restraint or booster | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Vermont |
| Virginia | Under 8 in a child restraint device in the back seat, rear-facing until 2 or the forward-facing weight minimum; ages 8 through 17 in a seat belt. | Height: No statutory height threshold for the under-8 restraint requirement. Weight: Forward-facing is not allowed until the child reaches 2 years old or the forward-facing weight minimum set by the restraint's manufacturer, whichever comes first. | Virginia Code 46.2-1098 sets a civil penalty of $50 for a first violation of 46.2-1095, which cannot be suspended; a second or later violation on a different date carries a civil penalty of up to $500. No court costs are assessed. | 2026-09-15 | View Virginia |
| Washington | Under 2 rear-facing; under 4 in a forward-facing harness; under 4'9" in a booster; under 13 in the back seat when practical. | Height: The booster stage ends at 4 feet 9 inches, when a properly adjusted seat belt may be used. Weight: No statutory weight thresholds; each stage ends at the restraint manufacturer's height or weight limit. | A violation of RCW 46.61.687 is a traffic infraction. The Washington Traffic Safety Commission listed the child restraint infraction at $136 in May 2024; the exact amount is set by the state court penalty schedule (IRLJ 6.2) and adjusted periodically. A first notice can be dismissed if the driver shows proof of acquiring an approved restraint within seven days. | 2026-09-12 | View Washington |
| West Virginia | 7 yrs or under and under 4'9" tall | Height: See child-restraint rule; includes height language where listed. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View West Virginia |
| Wisconsin | Under 1 yr or under 20 lbs in rear-facing child restraint | 1-3 yrs and 20-40 lbs must be in either a rear- or forward-facing child restraint | 4-7 yrs and 40-80 lbs and under 57" tall must be in either a rear- or forward-facing child restraint or a booster seat | Under 4 years and less than 40 lbs, or if the child is in a rear- or forward-facing child restraint, they mist be in the rear vehicle seat, if available | Height: See child-restraint rule; includes height language where listed. Weight: See child-restraint rule; includes weight language where listed. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Wisconsin |
| Wyoming | 8 yrs or under in rear seat if available | Height: No height threshold listed in GHSA summary. Weight: No weight threshold listed in GHSA summary. | Verify fine with state source; GHSA notes first-offense fines vary by state. | GHSA reviewed by SHSOs June 2025; extracted 2026-07-23 | View Wyoming |
Booster types
Backless vs high-back booster seat requirements
Parents often compare backless booster seat requirements with high-back booster seat requirements, but the legal answer is usually not "one type is always required." The better answer is that both types must be used according to state law, the booster manual, the vehicle manual, and the belt fit they create.
A high-back booster can be useful when the vehicle seat does not provide enough head support, when the shoulder belt needs help staying in position, or when a younger booster-age child benefits from extra structure. A backless booster can be appropriate for older children who have proper vehicle head support and a good lap-and-shoulder belt fit. Illinois guidance is a good example of the detail parents need: boosters should not be used with lap-only belts, the shoulder belt should lie across the shoulder and chest, and a backless booster requires proper head restraint position.
The key requirement for either style is belt position. A booster should make the adult seat belt fit the child. If the booster makes the child sit too loosely, if the shoulder belt is routed incorrectly, if the child puts the shoulder belt behind the back, or if the lap belt sits on the stomach, the setup is not doing its job.
Shopping picks
Quick picks: booster seats that match this page
Shopping links, separate from the law and safety guidance on this page; they do not change what the state requires. See our affiliate disclosure.
High-back booster
Graco TurboBooster 2.0 Highback Booster Car Seat — for a child who still needs head and side support, or a vehicle seat with a low head restraint.
Not sure which type fits your child? Use the seat finder — enter age, height, and weight to see the stage and a matching seat.
Age checklist
Check your state law first, then confirm the child has outgrown the forward-facing harness.
Age guideHeight checklist
A 4'9" benchmark is common, but belt position matters more than height alone.
See fit testWeight checklist
Use the car seat label and manual. Weight limits differ by seat model.
Harness limitsMyths
5 common booster seat requirement myths
- Myth: age 8 automatically means no booster. Reality: age 8 may change the legal minimum in some states, but the child still needs a proper belt fit.
- Myth: weight alone decides booster readiness. Reality: weight matters, but so do height, belt fit, maturity, and the seat manual.
- Myth: a lap-only belt is fine with any booster. Reality: most belt-positioning boosters require a lap-and-shoulder belt.
- Myth: backless boosters have no special requirements. Reality: backless boosters still require correct belt routing and proper vehicle head support.
- Myth: state law equals safest practice. Reality: state law is the minimum. Safety guidance often recommends keeping a booster longer.
Parent decision path
A practical booster seat requirement checklist
- Find your state law and note the minimum age, height, weight, rear-seat rule, and fine.
- Check whether your child has outgrown the forward-facing harness height or weight limit.
- Check the booster label and manual for minimum and maximum size limits.
- Place the booster in the back seat when possible and use the correct belt path.
- Confirm lap belt position across the upper thighs or hips.
- Confirm shoulder belt position across the shoulder and chest.
- Watch the child for the full ride. If they slouch, lean, unbuckle, or move the belt, they may not be ready for that setup.
- Repeat the check in each vehicle, including grandparents' cars, rentals, rideshares, and carpool vehicles.
FAQ
Common Questions
What are the requirements for a booster seat?
Requirements vary by state, but many laws use age, height, and sometimes weight. Safety guidance says children should use a booster until the vehicle belt fits properly.
What are booster seat requirements by age, height, and weight?
Use age to check the likely seat stage, height to check adult-belt fit, and weight to check the car seat or booster label. State law sets the legal minimum, while NHTSA, CDC, and AAP guidance focus on correct belt fit.
What are weight booster seat requirements?
There is no single national booster-seat weight requirement. Weight can appear in state law, forward-facing harness limits, and the booster manufacturer's minimum and maximum limits, so parents should check all three.
Is there a federal booster seat law?
Federal rules define and regulate child restraint systems, while states set most child passenger restraint requirements for everyday vehicle use.
What height does a child need to stop using a booster?
A common safety benchmark is 4 feet 9 inches, but the real test is whether the lap and shoulder belt fit correctly.
Are backless booster seats legal?
Backless boosters can be legal when used according to the seat instructions and state law, but they require a proper lap-and-shoulder belt fit.
What weight does a child need for a booster seat?
There is no single national booster-seat weight rule. Parents should check state law, the booster label, and the forward-facing harness limits of the seat the child is leaving.
Can a child use a booster with a lap-only belt?
Most belt-positioning boosters require a lap-and-shoulder belt. A lap-only belt should not be used with a booster unless the booster and vehicle instructions explicitly allow it.
Do state laws match NHTSA and CDC safety guidance?
Not always. Some state laws allow seat belts earlier than NHTSA, CDC, or AAP guidance would recommend, so this guide separates legal minimums from safety best practice.
How often should booster seat laws be checked?
Check state laws before publishing, before a road trip, and at least annually. States can amend child passenger safety laws or agency guidance.