Where in the US can I legally not wear a seatbelt?

New Hampshire is the only state with no adult seatbelt law (under-18 still required). Every other state plus DC requires adult front seatbelt; 31 states + DC require rear. The "live free or die" exception is exactly one state.

What states have no motorcycle helmet law?

Illinois, Iowa, and New Hampshire have no motorcycle helmet law at all. Many other states require helmets only for riders under a certain age (typically 18 or 21). 18 states have universal-helmet laws.

Do children always need a car seat?

In the four countries covered: yes, under specified ages. US: varies by state but children 0–8 typically require a forward-facing or booster seat. Japan: under 6. Korea: under 6. Canada: under 9 or under 145 cm (varies by province).

Seatbelt and motorcycle-helmet laws compared — US, Canada, Japan, Korea

Of the four countries we cover, three have universal seatbelt and motorcycle-helmet laws across all passengers and ages. The fourth — the United States — does not. American helmet law in particular is a patchwork: some states require helmets for all riders, some for riders under a certain age, three states have no helmet law at all.

We compare three rules — front seatbelt, rear seatbelt, motorcycle helmet — across the four countries. Each is the type of regulation that foreign visitors often assume is universal and then discover is not.

⚠️ Not legal advice. Traffic and insurance laws change. Verify with the official source before you drive. Full disclaimer.

Side-by-side comparison

Country	Seatbelts (front / rear)	Motorcycle helmets
🇺🇸United States	Front: 49 states + DC require (NH no); Rear: 31 states require	New Hampshire has no adult seatbelt law (children only). Helmet law varies: ~18 states universal, ~29 partial (age-restricted), 3 (Illinois, Iowa, NH) none. (NHTSA — Seatbelt Countermeasures)
🇯🇵Japan	Front + rear: required all passengers	Universal seatbelt (front + rear) since 2008. Universal helmet for all motorcycle riders including mopeds. Child seats required for under-6. (Japan NPA)
🇰🇷South Korea	Front + rear: required all passengers	Universal seatbelt since 2018 (rear was previously expressway-only). Universal motorcycle helmet. Child seats required for under-6. (KoROAD)
🇨🇦Canada	Front + rear: all provinces	Universal across all provinces and territories. Universal motorcycle helmet across all provinces. (Transport Canada)

Country detail

United States

US seatbelt and helmet law is the most variable in the developed world. 49 states require adult front seatbelt; New Hampshire requires belts only for under-18. Rear seatbelt is required in 31 states; the rest leave it discretionary. Motorcycle helmet law splits the country: 18 universal-helmet states (California, NY, Tennessee, etc.), ~29 partial states (helmets required under a certain age, often 21), and 3 states (Illinois, Iowa, New Hampshire) with no helmet law. For visitors, the practical rule is: always wear them. The risk-reduction is enormous and the legal exposure for foreigners is real.

Japan

Japan made rear seatbelts universally mandatory in 2008, closing a long-standing gap. Helmets are required for every motorcycle and moped operator. Children under 6 must use a child seat. Japan's overall traffic-fatality rate is among the lowest in the OECD, partly because of high seatbelt compliance (95 %+ front).

South Korea

Korea expanded rear seatbelt requirements from expressway-only to universal in 2018. Helmets are required for all motorcycle operators including delivery scooters (a major part of the Korean food-delivery ecosystem). Enforcement is camera-heavy at intersections; ID-readable cameras can identify unbelted passengers.

Canada

Canada's provincial governments standardised seatbelt and helmet requirements decades ago — all provinces require front and rear seatbelts and all riders wear helmets. The cultural norm of compliance is closer to Japan than to parts of the US.

Frequently asked

Where in the US can I legally not wear a seatbelt?: New Hampshire is the only state with no adult seatbelt law (under-18 still required). Every other state plus DC requires adult front seatbelt; 31 states + DC require rear. The "live free or die" exception is exactly one state.
What states have no motorcycle helmet law?: Illinois, Iowa, and New Hampshire have no motorcycle helmet law at all. Many other states require helmets only for riders under a certain age (typically 18 or 21). 18 states have universal-helmet laws.
Do children always need a car seat?: In the four countries covered: yes, under specified ages. US: varies by state but children 0–8 typically require a forward-facing or booster seat. Japan: under 6. Korea: under 6. Canada: under 9 or under 145 cm (varies by province).

Sources

[1]NHTSA — Seat Belts — NHTSA · accessed 2026-04-23
[2]NHTSA — Countermeasures That Work: Seat Belt Laws — NHTSA · accessed 2026-04-23
[3]NHTSA — Car Seats and Booster Seats — NHTSA · accessed 2026-04-23
[4]National Police Agency — Rules of the Road — Japan NPA · accessed 2026-04-23
[5]KoROAD — Road Traffic Authority — KoROAD · accessed 2026-04-23
[6]Transport Canada — Transport Canada · accessed 2026-04-23