BSGBoosterSeatGuide

State law page

Hawaii Booster Seat Laws & Requirements (2026)

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.

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FieldHawaii snapshot
Age requirementChildren 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 requirementNo height threshold listed in GHSA summary.
Weight requirementNo weight threshold listed in GHSA summary.
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 requiredChildren 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.
Adult safety belt permissibleChildren 7 to 10 years old who are taller than 4’9” must be properly restrained by a seat belt.
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 Hawaii 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