Car Rental Travel

Renting a Car in Guam with Kids | Child Seat Laws and Family Guide

2026年9月14日

A child seat should be arranged before a family road trip in Guam. Do not choose by age alone: confirm your child’s height and weight, the restraint manufacturer’s limits, and whether the selected vehicle class can accommodate every required seat. This guide explains the process from booking to departure.

Guam’s child-restraint law

Guam law requires a child under age 4 to be secured in a federally compliant child passenger restraint used according to the manufacturer’s instructions. A child age 4 through 11 who is under 4 feet 9 inches tall must use a booster seat or an appropriately fitting child restraint.

This does not mean every child from birth through age 11 uses the same seat. Check the child’s age, height, and weight against the limits of the actual restraint. Other occupants must use seat belts.

Three types offered by ONE’S

ONE’S currently lists three options:

• Infant seat: approximately ages 0–1
• Child seat: approximately ages 1–4
• Junior/booster seat: approximately age 4 and older

These age bands are only a guide. Provide each child’s age, height, and weight when booking and choose a restraint within its stated limits. The current terms list a fee of $5 per child per day. Confirm the latest price and availability in the booking process.

The renter installs the seat in the rear

At ONE’S, the renter is responsible for installation, and child restraints must be placed in the rear seat. Follow the labels and instructions for the supplied restraint and the vehicle, then verify the installation before driving.

1. Park in a safe location and switch off the engine
2. Secure the restraint in the rear seat exactly as instructed
3. Check that the installed restraint does not move excessively
4. Seat the child and check the harness or seat belt for twists and slack

Confirm the vehicle class when three seats are needed

ONE’S states that three child restraints cannot be installed across the rear seat of A- or B-class vehicles. If you require three seats—or several restraints of different sizes—confirm a suitable vehicle class and availability before booking. Reservations are by class; a specific model or color cannot be guaranteed.

Family pre-drive checklist

• Provide the age, height, and weight of every child
• Confirm each restraint type, quantity, price, and availability
• Confirm that the vehicle class can safely accommodate all seats
• Keep drinks, snacks, spare clothes, and wipes accessible
• Plan realistic driving times and rest stops
• Never leave a child alone in a vehicle, even briefly

Frequently asked questions

Does every child age 11 or younger need a child seat?

Children under age 4 need a child restraint. Children age 4 through 11 need a booster or suitable child restraint when they are under 4 feet 9 inches tall.

Will ONE’S staff install the seat?

The renter installs it. Place it in the rear seat and follow the restraint and vehicle instructions before departure.

Can three child seats fit across the rear seat?

Not in ONE’S A- or B-class vehicles. Space also varies by restraint type, so ask ONE’S which vehicle class can accommodate your combination before booking.

Summary

For a family rental in Guam, check the legal age and height thresholds and reserve a restraint suited to each child’s size. The renter installs it in the rear seat and checks the attachment and harness before driving. When multiple seats are needed, confirm vehicle-class compatibility in advance.

Information checked September 13, 2026. Laws, prices, availability, and procedures may change. Review the current Guam code, ONE’S official website, and booking instructions before use.

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