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Car seat laws in Idaho

What Idaho law requires at each stage, from rear-facing to the front seat, next to what NHTSA and the AAP recommend. Plus the fine and where to get a free car seat check.

Checked October 2026 · 10 sources · Not legal advice

Short answer

Idaho requires children 6 and younger to ride in a child safety restraint that meets federal standard FMVSS 213. From age 7, the regular seat belt law applies. There is no rear-facing or back seat requirement.

Sources: Idaho State Legislature; Idaho Supreme Court (published by the Idaho State Bar). Data as of October 2026.

What does Idaho car seat law require at each age?

The law sets the minimum. NHTSA and the AAP recommend keeping each stage until your child outgrows the seat, which usually means longer.

Idaho car seat law at each stage, beside NHTSA and AAP guidance
StageWhat Idaho law requiresNHTSA and AAP guidance

Rear-facing car seat

No state rule

Idaho law has no rear-facing requirement.

NHTSA and the AAP recommend keeping your child rear-facing as long as possible, until they reach the top height or weight limit allowed by the car seat's manufacturer. A child under age 1 should always ride rear-facing, and most convertible seats allow rear-facing for 2 years or more.

Forward-facing seat with a harness

No state rule

The law requires a child safety restraint (see the booster row) but doesn't specify a harness or booster.

NHTSA and the AAP recommend using a forward-facing car seat with a harness and tether once your child outgrows the rear-facing limits, for as long as possible, up to the highest weight or height the seat's manufacturer allows.

Booster seat

Best practice goes further

A child six years of age or younger must be properly secured in a child safety restraint that meets federal motor vehicle safety standard no. 213 (car seats and boosters both meet it).

NHTSA and the AAP recommend using a belt-positioning booster seat after your child outgrows the harnessed seat, until the vehicle seat belt fits properly, typically when they reach about 4 feet 9 inches tall and are 8 to 12 years old.

Seat belt

From age 7, every occupant must wear a safety restraint under Idaho's seat belt law.

NHTSA and the AAP recommend moving to the seat belt alone only when it fits: the lap belt lies snugly across the upper thighs, not the stomach, and the shoulder belt crosses the middle of the chest and shoulder, not the neck or face. Children big enough for the belt alone should always use a lap and shoulder belt.

Back seat

No state rule

No general rule. If all seat belts are in use and a child goes unrestrained, that child must be placed in the rear seat if the vehicle has one.

NHTSA and the AAP recommend keeping all children younger than 13 in the back seat.

The law: Idaho Code § 49-672, in effect since 2005.

Sources: Idaho State Legislature; Idaho Supreme Court (published by the Idaho State Bar); Idaho Transportation Department, Office of Highway Safety; Insurance Institute for Highway Safety. Data as of October 2026.

What are the fines and exemptions in Idaho?

First offense

$84

The Idaho Supreme Court infraction schedule sets a $84 total: a $27.50 fixed penalty plus court costs and fees.

Exemptions

Applies only to noncommercial drivers in vehicles made with seat belts after January 1, 1966. Exempt when all seat belts are in use (the unrestrained child goes in back), and while a child is out of the seat for nursing or other immediate physiological needs.

Questions about the law

This is general information, not legal advice. For how the law applies to you, ask Idaho Transportation Department, Office of Highway Safety.

The $84 comes from the Supreme Court schedule amendment effective Nov. 27, 2023. A secondary search summary says the FY 2026 schedule also totals $84, but its PDF returned 404, so that isn't confirmed. The ITD page links to an interactive map of car seat inspection sites. The statute was last amended in 2005 and shows no 2026 change (the page says statutes update July 1 after each session).

Where can you get your car seat checked for free?

Certified child passenger safety technicians check car seats at inspection stations nationwide. NHTSA says they inspect seats free of charge in most cases and show you how to install and use the seat correctly, and some locations offer virtual inspections. Search NHTSA's locator by ZIP code or city (it can filter for Spanish-speaking technicians), or find a technician through Safe Kids Worldwide. Idaho lists its own fitting stations.

Find a seat check in Idaho How to get a free car seat

Sources: National Highway Traffic Safety Administration; American Academy of Pediatrics (HealthyChildren.org)

Where are the car seat inspection stations in Idaho?

NHTSA's locator lists 89 car seat inspection stations in Idaho, in 46 cities and towns. Meridian has the most (9), then Lewiston (6). NHTSA flags 9 of them as Spanish-speaking.

89

inspection stations in NHTSA's locator

NHTSA, October 2026

46

cities and towns with a station

NHTSA, October 2026

9

flagged as Spanish-speaking

NHTSA, October 2026

27

of 89 records updated since 2023

Newest: September 9, 2026

Cities with the most stations

  1. Meridian9 stations
  2. Lewiston6 stations
  3. Pocatello5 stations
  4. Boise4 stations
  5. Twin Falls4 stations
  6. Burley3 stations
  7. Idaho Falls3 stations
  8. Nampa3 stations

Plus 38 more cities and towns. Search NHTSA's locator by ZIP code for the ones near you.

Spanish-speaking stations are listed in Bellevue, Burley, Caldwell, Emmett, Hailey, Kuna, McCall and Nampa, and 1 more places. Use the locator's Spanish-speaking filter to see them.

Search NHTSA's locator by ZIP

Source: National Highway Traffic Safety Administration. Data as of October 2026.

Choosing and getting a car seat

Infant vs convertible car seat: which to buy firstInfant vs convertible car seat, compared with AAP and NHTSA guidance: rear-facing limits, portability, when to switch, installation and free seat checks.How to get a free car seatWhere to get a free infant car seat in 2026: Medicaid plan extras, Safe Kids coalitions and 211, plus free installation checks and when a used seat isn't safe.

Questions about car seat laws in Idaho

When can a child face forward in a car seat in Idaho?

Idaho law has no rear-facing requirement. NHTSA and the AAP recommend keeping your child rear-facing as long as possible, until they reach the top height or weight limit allowed by the car seat's manufacturer. A child under age 1 should always ride rear-facing, and most convertible seats allow rear-facing for 2 years or more.

When can a child stop using a booster seat in Idaho?

A child six years of age or younger must be properly secured in a child safety restraint that meets federal motor vehicle safety standard no. 213 (car seats and boosters both meet it). NHTSA and the AAP recommend going further: using a belt-positioning booster seat after your child outgrows the harnessed seat, until the vehicle seat belt fits properly, typically when they reach about 4 feet 9 inches tall and are 8 to 12 years old. The AAP says an adult seat belt fits when: the shoulder belt lies across the middle of the chest and shoulder, not the neck or throat; the lap belt is low and snug across the upper thighs, not the belly; and the child is tall enough to sit against the vehicle seat back with knees bent over the edge of the seat without slouching, and can stay that way for the whole trip. NHTSA uses the same lap-belt and shoulder-belt checks. The 5-step test, which California writes into law from January 1, 2027, asks: 1) Does the child sit all the way back against the seat? 2) Do the knees bend over the edge of the seat? 3) Does the shoulder belt snugly cross the center of the chest and shoulder, not the neck? 4) Is the lap belt as low as possible, touching the thighs? 5) Can the child stay seated like this for the whole trip?

How old does a child have to be to sit in the front seat in Idaho?

No general rule. If all seat belts are in use and a child goes unrestrained, that child must be placed in the rear seat if the vehicle has one. NHTSA and the AAP recommend keeping all children younger than 13 in the back seat.

What is the fine for a car seat violation in Idaho?

The Idaho Supreme Court infraction schedule sets a $84 total: a $27.50 fixed penalty plus court costs and fees.

Where can I get a car seat inspection in Idaho?

NHTSA's locator lists 89 car seat inspection stations in Idaho, in 46 cities and towns. Meridian has the most (9), then Lewiston (6). NHTSA flags 9 of them as Spanish-speaking. Certified technicians check seats for free in most cases. Search NHTSA's locator by ZIP code and call the station before you go.

More for parents in Idaho

Sources

  1. 1.Idaho Code § 49-672, Passenger safety for children Idaho State Legislature. Accessed October 14, 2026.
  2. 2.Idaho Infraction Rule 9(b) Infraction Penalty Schedule (amendment effective Nov. 27, 2023), item 02, I.C. § 49-672 Idaho Supreme Court (published by the Idaho State Bar). Accessed October 14, 2026.
  3. 3.Child Safety Seats Idaho Transportation Department, Office of Highway Safety. Accessed October 14, 2026.
  4. 4.Seat belt and child seat laws (table dated October 2026) Insurance Institute for Highway Safety. Accessed October 14, 2026.
  5. 5.Child Passenger Safety state laws (last updated October 2025) Governors Highway Safety Association. Accessed October 14, 2026.
  6. 6.Car Seats and Booster Seats National Highway Traffic Safety Administration. Accessed October 14, 2026.
  7. 7.Car Seats: Information for Families (last updated 4/16/2026) American Academy of Pediatrics (HealthyChildren.org). Accessed October 14, 2026.
  8. 8.California Vehicle Code § 27363 (exemptions; current version and version operative January 1, 2027) California Legislative Information. Accessed October 14, 2026.
Show all 10 sources
  1. 9.Car Seat Inspection (inspection station locator) National Highway Traffic Safety Administration. Accessed October 14, 2026.
  2. 10.Car Seat Inspection Locator API (CSSIStation) National Highway Traffic Safety Administration. Accessed October 16, 2026.

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