Delaware car seat law (2026)
Children younger than 2 years and less than 30 pounds must ride in a rear-facing seat with a 5-point harness; children younger than 4 years and less than 40 pounds in either a forward- or rear-facing seat with a 5-point harness; children 4 through 15 in a booster based upon the manufacturer's guidelines, or a seat belt.
| Provision | What the IIHS table lists for Delaware |
|---|---|
| Child restraint | Children younger than 2 years and less than 30 pounds must ride in a rear-facing seat with a 5-point harness; children younger than 4 years and less than 40 pounds in either a forward- or rear-facing seat with a 5-point harness; children 4 through 15 in a booster based upon the manufacturer's guidelines, or a seat belt. |
| Adult seat belt | Children who have reached the booster's upper height/weight limits may use a seat belt, through age 15. |
| Rear seat | Children 11 years and younger and 65 inches or less must be in the rear seat if the passenger airbag is active. |
The law names ages — the seat's specs decide the switch
Every threshold above meets a spec question: is your child still within the seat's own height/weight limits for that mode? That's published manufacturer data, and it's what this site organizes:
- Keeping a toddler rear-facing longer → extended rear-facing seats (higher rear-facing limits).
- Moving from harness to booster → booster seats, incl. narrow boosters for 3-across.
- One seat across the whole journey → all-in-one (4-in-1) seats.
- Not sure a seat works in your car → how to check fit.
FAQ
What is the car seat law in Delaware?
Children younger than 2 years and less than 30 pounds must ride in a rear-facing seat with a 5-point harness; children younger than 4 years and less than 40 pounds in either a forward- or rear-facing seat with a 5-point harness; children 4 through 15 in a booster based upon the manufacturer's guidelines, or a seat belt. (As published in the IIHS state law table, retrieved 2026-07-16 — a summary, not legal advice.)
When can a child use just a seat belt in Delaware?
Children who have reached the booster's upper height/weight limits may use a seat belt, through age 15. Best practice is to keep using a booster until the adult belt fits properly — lap flat on the thighs, shoulder belt across the chest — regardless of the legal minimum.
Does Delaware require children to ride in the back seat?
Children 11 years and younger and 65 inches or less must be in the rear seat if the passenger airbag is active. (As published in the IIHS state law table.) NHTSA's recommendation goes further: all children under 13 in the back seat, and never a rear-facing seat in front of an active passenger airbag.
Is the Delaware law the same as best practice?
No — the law is the legal minimum. NHTSA recommends keeping children in each stage (rear-facing, forward-facing harness, booster) up to the seat's own height and weight limits, which usually lasts longer than the law requires.
All states: car seat laws by state · nearby in the list: District of Columbia · Florida · Georgia · Hawaii · Idaho