Booster Seat Laws in Oregon: Requirements, Fines, and Exemptions

Booster seat laws in Oregon require a child to ride in a booster once they weigh more than 40 pounds, and to keep using one until they either turn 8 years old or reach 4 feet 9 inches tall, whichever comes first.¹ The driver, not the parent, gets the ticket if a child under 16 isn’t properly restrained, and the presumptive fine is $115 per child.

When a Booster Seat Is Required

The booster stage starts at 40 pounds. Under ORS 811.210, a child who weighs more than 40 pounds but is both shorter than 4 feet 9 inches and younger than 8 must ride in a booster seat or another approved elevating child safety system.¹ The booster lifts the child so the vehicle’s seat belt crosses the body correctly. Without that lift, the shoulder belt tends to cut across the neck and the lap belt rides up over the stomach, which can cause serious injuries in a crash.

There is one alternative built into the statute. If your child weighs more than 40 pounds but still fits within the weight rating of a harness-based car seat, you can keep them in the harnessed seat instead of moving to a booster.¹ Many safety experts prefer this, because a harness spreads crash forces across more of the body than a seat belt does.

The Stages Before and After

Before 40 pounds, a booster isn’t legal. Oregon requires any child at or under 40 pounds to ride in a child safety system with its own internal harness rather than in a booster that uses the vehicle’s belt.¹ Children must also ride rear-facing from birth until at least age 2, or until they hit the upper limits of their rear-facing seat.²

When Your Child Can Stop Using a Booster

Your child can move to the vehicle’s regular lap-and-shoulder belt once they meet either of two thresholds: turning 8, or reaching 4 feet 9 inches tall.¹ Only one has to be true. A tall 6-year-old who has hit 4 feet 9 inches can legally use the seat belt alone, and so can an 8-year-old who is still shorter than that.

Legal and safe are not always the same. Oregon defines a proper fit as the lap belt sitting low across the upper thighs, not the stomach, and the shoulder belt crossing over the collarbone and away from the neck.¹ If the shoulder belt hits your child’s neck or the lap belt rides up on their belly, the belt does not fit yet, and a booster is still the safer choice regardless of age or height.

On seating position, ODOT strongly recommends that all children under 13 ride in the back seat, though Oregon has not made this a legal requirement.² The concern is the front passenger airbag, which can deploy with enough force to seriously injure a small child.

Who Gets the Ticket and How Much It Costs

The driver is liable. Under ORS 811.210, a person commits the offense of failure to properly use safety belts when they operate a vehicle carrying a passenger under 16 who is not properly restrained.¹ If a grandparent, family friend, or babysitter is driving your child and skips the booster, that driver gets the citation. Anyone who transports your children needs to know these rules, not just you.

The violation is a Class D traffic violation with a presumptive fine of $115 and a statutory maximum of $250 for individuals.¹³ Because the driver is on the hook for each improperly restrained child, two kids without proper seats mean two separate citations and two fines.²

Some Oregon courts will reduce or waive the fine if the driver shows proof of obtaining a compliant seat after the citation. It’s discretionary, and the violation itself stays on record even if the fine is dropped.

Exemptions Worth Knowing

ORS 811.215 lists several situations where the standard child restraint rules do not apply:

Operators of taxis and other for-hire vehicles designed for 15 or fewer passengers do not have to ensure child passengers are in a child safety system.⁴
Drivers of vehicles operated by a mass transit district or tribal government transportation system are exempt while carrying passengers.⁴
A person riding in an ambulance to provide medical aid is exempt if a safety belt would substantially interfere with treatment.⁴
If every seating position in the vehicle is already occupied, the rule doesn’t apply to an additional passenger.⁴
Older vehicles that were not required to have seat belts when built are exempt, unless belts have since been installed.⁴

The taxi exemption does not translate cleanly to rideshare. Uber and Lyft generally expect riders to supply their own car seats, so if you’re taking a rideshare in Oregon with a booster-age child, plan to bring one.

Lap-Belt-Only Rear Seats

The booster requirement itself has one built-in exception. If the rear seat of the vehicle is not equipped with shoulder belts, a child over 40 pounds can be secured by the lap belt alone rather than placed in a booster.¹ This comes up in some older vehicles. A lap belt alone protects far less than a lap-and-shoulder combination, so keeping the child in a harnessed seat is the safer choice when it’s available.

Medical Exemptions

If a physical condition makes a car seat or booster impractical or harmful for your child, Oregon allows a medical exemption. A licensed physician, physician associate, or nurse practitioner has to complete a written statement explaining why the restraint is unsuitable, and the form is submitted to ODOT’s Transportation Safety Office in Salem.⁵ If the request qualifies under ORS 811.220, ODOT issues a certificate of exemption, which can be temporary or permanent. Without that certificate, a medical condition on its own isn’t a defense to a citation.

1
Oregon State Legislature. Oregon Code 811.210 – Failure to Properly Use Safety Belts
2
Oregon Department of Transportation. Oregon State Child Restraint Law
3
Oregon State Legislature. Oregon Code 153.019 – Presumptive Fines Generally
4
Oregon Revised Statutes. Oregon Code ORS 811.215 – Exemptions From Safety Belt Requirements
5
Oregon Department of Transportation. Request for Exemption From Use of Motor Vehicle Safety Restraints