BSGBoosterSeatGuide

State law page

Colorado Booster Seat Laws & Requirements (2026)

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)

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FieldColorado snapshot
Age requirementUnder 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 requirementNo height threshold listed in GHSA summary.
Weight requirementSee child-restraint rule; includes weight language where listed.
Fine / penaltyVerify fine with state source; GHSA notes first-offense fines vary by state.
Last checkedGHSA reviewed by SHSOs June 2025; extracted 2026-07-23
Verification levelIndex source; official state verification pending
Child restraint requiredUnder 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)
Adult safety belt permissible9-17 yrs (effective 01/01/25)
Verification levelIndex source; official state verification pending

Sources

Law and source links

Index source: https://www.ghsa.org/state-laws-issues/child-passengers

Statute/source text: GHSA child passenger law summary; Safe Kids state law tracker cross-check

Safety guidance

Even when Colorado law allows a seat belt, NHTSA, CDC, and AAP guidance may still recommend a booster until the vehicle belt fits properly.

Requirements guide

Understand age, height, weight, and seat belt fit.

Read requirements

Age guide

See when children typically start and stop using boosters.

Read age guide