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Iowa car seat laws

Iowa Code § 321.446 · Last checked September 23, 2026

Car seat stages

The statute text comes first. Numbers are a summary for comparison, not a replacement for the law.

Rear-facing seat

Statute text

A child under one year of age and weighing less than twenty pounds who is being transported in a motor vehicle subject to registration, except a school bus or motorcycle, shall be secured during transit in a rear-facing child restraint system that is used in accordance with the manufacturer's instructions.

§ 321.446(1)(a).

What the law sets

Rear-facing seat required by law
Yes
Rear-facing until age
1 year
Rear-facing until weight
20 lb
Rear-facing until height
Not addressed in statute

Not set in § 321.446(1)(a).

Leaving rear-facing
Meeting any one listed limit is enough

The rule covers a child under one AND under 20 pounds, so reaching either one year or 20 pounds ends it.

Recommended (not law)

NHTSA

Children under age 1 should always ride in a rear-facing car seat. Keep your child rear-facing as long as possible — it's the best way to keep them safe — until they reach the top height or weight limit allowed by the car seat's manufacturer.

NHTSA – Car Seats and Booster Seats

AAP

All infants should ride rear-facing, starting with their first ride home from the hospital, and should continue riding rear-facing as long as possible until they reach the highest weight or height allowed by their car safety seat's manufacturer.

HealthyChildren.org (AAP) – Car Safety Seats: Information for Families

Forward-facing harness seat

Statute text

Not addressed in statute.

Not set in § 321.446; subsection 1(b) requires a child restraint system for a child under six without naming a forward-facing harness.

What the law sets

Forward-facing harness required by law
Not addressed in statute

Not set in § 321.446; subsection 1(b) requires a child restraint system for a child under six without naming a forward-facing harness.

Harness until age
Not addressed in statute

Not set in § 321.446.

Harness until weight
Not addressed in statute

Not set in § 321.446.

Harness until height
Not addressed in statute

Not set in § 321.446.

Leaving the harness
Not addressed in statute

Not set in § 321.446.

Recommended (not law)

NHTSA

Once a child outgrows the rear-facing car seat, they are ready for a forward-facing car seat with a harness and tether. Keep the child in the forward-facing seat until they reach the top height or weight limit allowed by the car seat's manufacturer, then move to a booster seat, still in the back seat.

NHTSA – Car Seats and Booster Seats

AAP

Children should use a forward-facing car seat with a harness after outgrowing the rear-facing weight or height limit. It is best for children to ride in a seat with a harness as long as possible, at least to 4 years of age.

HealthyChildren.org (AAP) – Car Safety Seats: Information for Families

Booster seat

Statute text

A child under six years of age who does not meet the description in paragraph "a" and who is being transported in a motor vehicle subject to registration, except a school bus or motorcycle, shall be secured during transit by a child restraint system that is used in accordance with the manufacturer's instructions.

§ 321.446(1)(b). Under § 321.446(7), "child restraint system" includes a belt-positioning seat or booster seat, so a booster is one way to comply; the statute does not require one by name.

What the law sets

Booster required by law
Yes

Any child restraint system meeting 49 C.F.R. § 571.213 satisfies § 321.446(1)(b); a booster is not specifically required.

Booster until age
6 years
Booster until weight
Not addressed in statute

Not set in § 321.446(1)(b).

Booster until height
Not addressed in statute

Not set in § 321.446(1)(b).

Leaving the booster
Meeting any one listed limit is enough

Age is the only limit: the child restraint requirement ends at six.

Recommended (not law)

NHTSA

Keep your child in a booster seat until they are big enough to fit in a seat belt properly — the lap belt lying snugly across the upper thighs (not the stomach) and the shoulder belt snug across the shoulder and chest (not the neck or face).

NHTSA – Car Seats and Booster Seats

AAP

All children whose weight or height exceeds the forward-facing limit for their car safety seat should use a belt-positioning booster seat until the vehicle seat belt fits properly, typically when they have reached 4 feet 9 inches in height and are 8 to 12 years of age.

HealthyChildren.org (AAP) – Car Safety Seats: Information for Families

Seat belt

Statute text

A child at least six years of age but under eighteen years of age who is being transported in a motor vehicle subject to registration, except a school bus or motorcycle, shall be secured during transit by a child restraint system that is used in accordance with the manufacturer's instructions or by a safety belt or safety harness of a type approved under section 321.445.

§ 321.446(2).

What the law sets

Seat belt alone from age
6 years
Seat belt alone from height
Not addressed in statute

Not set in § 321.446(2); no height condition.

Moving to the seat belt
Meeting any one listed limit is enough

Age is the only condition.

Recommended (not law)

NHTSA

Once a child is big enough to fit in a seat belt properly, they can ride with just the lap-and-shoulder belt, but should still ride in the back seat — NHTSA recommends keeping children in the back seat at least through age 12.

NHTSA – Car Seats and Booster Seats

AAP

Children should transition to the vehicle seat belt once it fits properly, typically at about 4 feet 9 inches in height and 8 to 12 years of age; all children younger than 13 years should ride in the back seat.

HealthyChildren.org (AAP) – Car Safety Seats: Information for Families

Front seat

Many states have no front-seat age in statute. Where that is the case, we say so and cite the section we read.

Front seat — statute text
Not addressed in statute

No front-seat provision in § 321.446. The only mention of a front seat is in § 321.446(3)(b), which withdraws the motor home exemption when a child rides in the seat directly to the driver's right.

Minimum age for the front seat
Not addressed in statute

No front-seat age in § 321.446.

Conditions
Not addressed in statute

No front-seat provision in § 321.446.

Penalties

What a car seat ticket costs, and whether showing proof of a proper seat can cancel it.

First offense — fine
$135

§ 321.446(4): simple misdemeanor punishable as a scheduled violation. § 805.8A(14)(c)(2) sets the scheduled fine for a § 321.446 violation at $135.

Repeat offense — fine
$135

§ 805.8A(14)(c)(2) sets the same scheduled fine for every offense; there is no separate repeat penalty.

License points
None

§ 321.446 sets no points and Iowa has no driver point system; § 321.210(2)(b) bars the department from considering child restraint violations under §§ 321.445 and 321.446 when deciding on a suspension.

Fine waiver
A person first charged under subsection 1 who had not acquired a child restraint system is not convicted if, within a reasonable time, they produce in court proof of having purchased or otherwise acquired one that meets federal motor vehicle safety standards (§ 321.446(5)).

Exemptions

Exempt means the statute excludes it. Silent means the statute does not address it.

Taxis
Car seat law applies

§ 321.446(4)(c) assumes taxis are covered: the citation is served on the parent, guardian or other responsible adult traveling with the child instead of the taxi operator.

Rideshare (Uber, Lyft)
Car seat law applies

§ 321.446(4)(c) names a personal vehicle operated by a transportation network company driver as defined in § 321N.1 and serves the citation on the accompanying adult instead of the driver.

Buses
Exempt

§ 321.446(1) and (2) except school buses, and § 321.446(3)(b) exempts the transportation of children in buses.

Medical exemption
Exempt

§ 321.446(3)(c): a child certified by a licensed physician or physician assistant as having a medical, physical or mental condition that prevents or makes inadvisable securing the child.

Out-of-state vehicles
Not addressed in statute

§ 321.446 does not address nonresident drivers or out-of-state vehicles; it applies to motor vehicles subject to registration.

How Iowa compares

Iowa is tied for 42nd of 47 jurisdictions with a numeric booster age: 5 jurisdictions, including Iowa, require a booster until age 6.

Compared with Illinois, Minnesota, Missouri, Nebraska, South Dakota, and Wisconsin, Iowa differs on: rear-facing rules (from Illinois, Minnesota, Missouri, Nebraska, and South Dakota), booster rules (from Illinois, Minnesota, Missouri, Nebraska, South Dakota, and Wisconsin), and front-seat rules (from Minnesota, Nebraska, and Wisconsin).

Law compared with the AAP recommendation

  • Iowa law: a rear-facing seat is required until the child reaches age 1 or 20 lb, whichever comes first. AAP recommends: All infants should ride rear-facing, starting with their first ride home from the hospital, and should continue riding rear-facing as long as possible until they reach the highest weight or height allowed by their car safety seat's manufacturer.
  • Iowa law does not address this stage. AAP recommends: Children should use a forward-facing car seat with a harness after outgrowing the rear-facing weight or height limit. It is best for children to ride in a seat with a harness as long as possible, at least to 4 years of age.
  • Iowa law: a booster seat is required until the child reaches age 6. AAP recommends: All children whose weight or height exceeds the forward-facing limit for their car safety seat should use a belt-positioning booster seat until the vehicle seat belt fits properly, typically when they have reached 4 feet 9 inches in height and are 8 to 12 years of age.
  • Iowa law: a child may use the seat belt alone once reaching age 6. AAP recommends: Children should transition to the vehicle seat belt once it fits properly, typically at about 4 feet 9 inches in height and 8 to 12 years of age; all children younger than 13 years should ride in the back seat.

See every state side by side on the comparison pages.

Guides covering Iowa

Sources

State law comes from the statute or state agency below. Recommendations come from NHTSA and the American Academy of Pediatrics. The responsible agency is Iowa Department of Public Safety, Governor's Traffic Safety Bureau.

State law

Recommendations

Disclaimer

This page summarizes Iowa law for reference. It is not legal or medical advice. The statute text is the law; the numbers are our summary of it. Legal minimums are not safety recommendations: NHTSA and the AAP recommend keeping a child in each stage for as long as the seat allows. Check the statute or Iowa Department of Public Safety, Governor's Traffic Safety Bureau before relying on anything here.