State law page

Kansas Booster Seat Laws & Requirements (2026)

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

Field	Kansas snapshot
Age requirement	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 requirement	See child-restraint rule; includes height language where listed.
Weight requirement	See child-restraint rule; includes weight language where listed.
Fine / penalty	Verify fine with state source; GHSA notes first-offense fines vary by state.
Last checked	GHSA reviewed by SHSOs June 2025; extracted 2026-07-23
Verification level	Index source; official state verification pending
Child restraint required	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
Adult safety belt permissible	8 years old and over 80 lbs or taller than 57" tall
Verification level	Index source; official state verification pending

Sources

Law and source links

Safety guidance

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

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

See when children typically start and stop using boosters.

Know when to move from harnessed seat to booster.