Trailer locks, explained simply
Find the right lock for your coupler, hitch, wheels and doors. We compare specs, fit charts, materials and owner reports so you can buy once and buy right.
Start here: unhitched trailer? You need a coupler lock. Hitched and parked? A locking hitch pin. Long-term storage? Add a wheel lock. Not sure? Read the best trailer locks.
Which lock do you need?
| Situation | Lock | Guide |
|---|---|---|
| Trailer unhitched at home or in storage | Coupler (ball/tongue) lock | Coupler locks |
| Hitched and parked | Locking hitch pin + latch lock | Pin locks |
| Long-term storage | Wheel lock or boot, plus coupler lock | Wheel locks |
| Boat trailer | Corrosion-resistant coupler lock | Boat trailer locks |
| Gooseneck trailer | Brand-specific gooseneck lock | Gooseneck locks |
| Enclosed / cargo trailer | Shrouded door lock | Door locks |
Guides
Best Trailer Locks for 2026Best Trailer Hitch LocksTrailer Ball Locks: Which One to BuyBest Trailer Coupler LocksBest Trailer Wheel LocksTrailer Pin Locks (Locking Hitch Pins)Best Gooseneck Trailer LocksTrailer Latch LocksBest Trailer Door LocksBest Boat Trailer LocksTrailer Tongue LocksHeavy-Duty Trailer Hitch Locks
Find your size
The ball size is stamped on the coupler: 1-7/8 in, 2 in or 2-5/16 in. Receiver hitch pins are usually 1/2 in (1-1/4 in receivers) or 5/8 in (2 in and larger).
How we research
We compare manufacturer specs, fit charts, materials and owner reports, and show prices as approximate ranges. We have not lab-tested these locks and we do not invent ratings. Read more.