Hawaii’s child passenger safety law sets specific age, weight, and height thresholds for car seats and boosters. This guide lays out the current requirements as published by the official Hawaii Department of Transportation, plus penalties, front-seat rules, and answers to the questions parents ask most.
Law data last verified against official state sources: October 4, 2026.
Quick answer
Hawaii requires rear-facing with harness under age 2, a harnessed seat for ages 2–4, a booster for ages 4–10 (unless over 4’9″), and fines of $100+ plus a mandatory safety class.
Hawaii car seat requirements by age and size
| Stage | What Hawaii law requires |
|---|---|
| Rear-facing | Children under 2 years of age → properly restrained in a rear-facing car seat with harness. |
| Forward-facing | Children 2 years old but less than 4 → properly restrained in a rear-facing or forward-facing car seat with harness. |
| Booster seat | Children 4 years old but under 10 → child passenger safety seat or booster seat, unless the child is over 4 feet 9 inches tall. |
| Seat belt only | Age 10+ (children from birth through age 10 must ride in a properly fitted child safety seat or booster seat). |
Fines and penalties in Hawaii
Fine: Violations can result in fines of $100 or more, mandatory driver’s education classes, and additional surcharges; violators are required by the court to attend a child passenger safety class.
Front seat rules in Hawaii
Front-seat rule: not specified in state law. Note: HDOT recommends children ride in the back seat until at least age 13).
The official law
- Statute: HRS § 291-11.5 (as amended by Act 122, 2022)
- Official source: Hawaii Department of Transportation
Hawaii car seat law FAQs
What is the fine for a car seat violation in Hawaii?
Fine: Violations can result in fines of $100 or more, mandatory driver’s education classes, and additional surcharges; violators are required by the court to attend a child passenger safety class.
When can my child stop using a booster seat in Hawaii?
Children 4 years old but under 10 → child passenger safety seat or booster seat, unless the child is over 4 feet 9 inches tall. Age 10+ (children from birth through age 10 must ride in a properly fitted child safety seat or booster seat).
Does Hawaii law require rear-facing car seats?
Children under 2 years of age → properly restrained in a rear-facing car seat with harness.
Can my child ride in the front seat in Hawaii?
Front-seat rule: not specified in state law. Note: HDOT recommends children ride in the back seat until at least age 13).
Where can I read the official Hawaii car seat law?
Statute: HRS § 291-11.5 (as amended by Act 122, 2022) Official source: Hawaii Department of Transportation.
Check another state
Driving across state lines? Requirements change at the border — use our interactive car seat law checker to look up any state by your child’s age, weight, and height.
Related state guides:
This page is for general informational purposes only and is not legal advice. Child passenger safety laws change — always verify current requirements with your state’s DMV, highway safety office, or the official statute linked below before making decisions.