The safest spot for a baby seat is the center of the rear seat, not either side. A study of children ages 0 to 3 found that sitting in the center is 43% safer than sitting on either outboard position. If the center doesn’t work for your vehicle, the passenger side of the rear seat is generally the better choice of the two sides, primarily because it lets you load and unload your child from the curb rather than the road.
Why the Center Seat Is Safest
The center rear seat puts the most distance between your child and the sides of the car, which matters because side-impact crashes are where seat position makes the biggest difference. Children seated on the side closest to a side impact are injured at more than four times the rate of those on the opposite side (8.9 per 1,000 crashes versus 2.1). They’re also 2.5 times more likely to suffer fatal injuries compared to children in the center seat.
For the center seat to work, it needs a three-point seat belt (the standard lap-and-diagonal type). If your center seat only has a lap belt, it may not be compatible with your car seat. Check both your vehicle manual and the car seat manual before installing there.
The LATCH Challenge in the Center
Most vehicles don’t have dedicated LATCH anchors for the center seat. Some allow you to “borrow” the innermost anchors from the two outboard positions, but the spacing between those borrowed anchors is wider than the standard 11 inches, which can affect how securely the seat fits. If you go this route, check that the lower anchor strap doesn’t cross over or block the seat belt buckles for the side seats. A blocked buckle means a passenger sitting next to the car seat can’t buckle up, creating a serious hazard in a crash.
If borrowing anchors doesn’t work cleanly, you have two options: install the car seat in the center using the seat belt instead of LATCH, or move it to one of the side positions and use the dedicated LATCH anchors there. A properly installed side seat is better than a poorly installed center seat every time.
Passenger Side vs. Driver Side
When the center isn’t an option, the passenger side rear seat has one practical advantage: in most driving scenarios, it puts your child on the curb side when you park. This means you’re not standing in traffic to get your baby in and out of the car. The UK’s Royal Society for the Prevention of Accidents recommends this position over the driver side for exactly that reason.
That said, the driver side can be the better pick in some situations. If you typically park with the driver’s side against the curb (common on one-way streets or certain parking layouts), that side becomes the safer loading spot. Think about where you park most often, whether that’s your driveway, a daycare lot, or street parking, and choose the side that keeps you on the sidewalk.
From a crash-safety perspective, neither outboard side has a meaningful built-in advantage over the other. What matters is which side gets struck in a crash, and that’s unpredictable. The real safety gains come from being in the center or, when that’s not possible, making sure the seat is installed tightly and correctly on whichever side you choose.
How Rear-Facing Seats Affect Legroom
A rear-facing car seat takes up more front-to-back space than a forward-facing one, and this can make one side of the car more practical than the other. In smaller vehicles, placing the seat behind the driver can push the driver’s seat uncomfortably close to the steering wheel. Putting it behind the passenger seat instead means only the front passenger loses legroom, which is a better trade-off for the person actually driving.
You can recover a surprising amount of space by adjusting the front seat to a more upright position. If you’re used to reclining while you drive, even a small change can be the difference between your knees hitting the dashboard and fitting comfortably. A more upright position is also safer for the front-seat occupant because the airbag needs to hit the right part of your body to work properly.
When the Front Seat Is the Only Option
In a two-seat truck or a vehicle with no usable rear seat, the front passenger seat may be the only place for a car seat. If you’re using a rear-facing seat in the front, you must deactivate the front passenger airbag. An active airbag deploying into the back of a rear-facing seat can cause fatal injuries. The deactivation switch is typically found on the end of the instrument panel near the passenger door or inside the glovebox, depending on the vehicle.
For forward-facing car seats placed in the front, many manufacturers specify that the airbag should remain active. Always check the instructions for both your vehicle and your car seat, since the rules differ by seat type and orientation. Move the front passenger seat as far back from the dashboard as it will go to create the most distance between your child and the airbag housing.
Quick Decision Guide
- Center rear seat with a three-point belt: This is the safest option. Use LATCH if your vehicle supports it in the center, or install with the seat belt.
- One side seat needed: Choose the passenger side for curb-side loading, unless your usual parking puts the driver side against the sidewalk.
- Tight on space: Place the seat behind the front passenger to avoid cramping the driver.
- No rear seat available: Use the front passenger seat with the airbag deactivated for rear-facing seats, and the seat pushed as far back as possible.
Whichever position you pick, a snug installation matters more than the exact spot. The seat should not move more than an inch side to side or front to back at the belt path. If you’re unsure whether you’ve got it right, local fire stations and hospitals often host free car seat inspection events where a certified technician can check your work in minutes.