South Dakota Car Seat Laws
South Dakota car seat laws: rear-facing, forward-facing, booster, and seat belt rules for kids by age and weight.
South Dakota child car seat law requires the following, by age and size. Verify the current statute before traveling.
| Stage | Min age | Min weight | Min height | Note |
|---|---|---|---|---|
| Rear-facing | Age 1+ | 20 lbs | — | |
| Forward-facing | Age 5+ | 40 lbs | — | |
| Booster seat | Age 5+ | 40 lbs | — | |
| Seat belt | Age 5+ | 40 lbs | — |
Front seat rules
Not specified — the law does not set a minimum front-seat age. Safety groups recommend keeping children in the back seat until 13.
Penalties
A violation can cost $20. Officers can pull you over for a child restraint violation (primary enforcement in most states).
Statute
Source: S.D. Codified Laws § 32-37-1. Last verified: 2026. Car seat laws change — check your state DMV or highway patrol before a long trip.
Frequently Asked Questions
How long must a child stay rear-facing in South Dakota?
Until at least age 1 or 20 lbs, whichever comes first. Many experts recommend rear-facing longer than the legal minimum.
When can a child use a booster seat in South Dakota?
After outgrowing the forward-facing harness — generally around age 5 or 40 lbs — until age 5.
What is the fine for a car seat violation in South Dakota?
About $20, plus possible court costs. Fines vary by county and repeat offenses may be higher.