10 Best Trailer Hitch Locks 2025 in the United States

The Rhino USA 2” Trailer Hitch Pin is a solid choice if you need a reliable lock for Class III and IV hitches, which are common on many trailers and RVs. Made from carbon steel and powder-coated in bright red, it offers strong resistance against theft thanks to its solid construction and tamper-resistant barrel lock. The patented slide cap is a smart addition, protecting the lock from dirt, mud, and debris, which helps maintain smooth operation even in tough weather conditions. This makes it a good option if you often tow in varying environments.

It is designed to fit standard 2-inch hitch receivers, so compatibility is straightforward for most users. Rhino USA, a family-owned American brand, also backs this lock with a lifetime replacement warranty, adding confidence in its durability and customer support. The lock comes with two keys, which is handy, but barrel locks may require a bit more care to avoid jamming over time compared to simpler locking mechanisms. Some users might find the size a little bulkier than basic pins, but the extra security features often justify this.

If ease of use is a priority, the dust cover helps keep it clean without extra effort, though unlocking it still needs a key. With thousands of positive reviews giving it a high rating, this hitch pin is a trustworthy pick for those seeking a strong, weatherproof, and theft-resistant lock backed by a reputable brand.

The AMPLock U-BRP2 Heavy Duty Trailer Coupler Lock is crafted from premium, rust-resistant materials, making it highly durable and resistant to tampering tools, heat, and even acid. This ensures reliable protection for your trailer, whether it's a boat, travel, or cargo trailer. A key strength is its customized design, which fits snugly on 2-inch ball couplers with flat lips, providing a secure fit for various trailer types without the hassle of poor compatibility.

Users will also appreciate the fast and easy push-to-lock mechanism, which simplifies the installation process and enhances safety by securing the trailer tongue lock in seconds. This lock is engineered to withstand advanced theft methods, such as grinders, drills, and pry bars, making it an excellent investment for safeguarding your trailer from both opportunistic and skilled thieves. Furthermore, its all-weather performance ensures long-lasting security, as the rust-resistant finish can handle diverse climates and conditions without compromising protection.

However, the AMPLock U-BRP2 has some drawbacks. It is relatively heavy, weighing nearly 10 pounds, which might be cumbersome for some users. Additionally, it is specifically designed to fit only 2-inch ball couplers with flat lips, which could limit its compatibility with other trailer types. Despite these considerations, the AMPLock U-BRP2 stands out for its robust security features and ease of use, making it a strong candidate for those needing heavy-duty trailer protection.

The Master Lock 379ATPY Universal Trailer Hitch Lock is a sturdy and reliable option for securing trailers, RVs, and vehicles. Made from zinc, this lock is designed to resist rust and corrosion, which enhances its durability and weather resistance. Its compatibility is notable, fitting 1-7/8 inch, 2 inch, and most 2-5/16 inch trailer couplers, making it versatile for various trailer types.

The advanced locking mechanism helps protect against picking and prying, adding an extra layer of security. This lock comes with two keys, making it convenient for multiple users or as a backup. At 5.1 x 3.5 x 4.6 inches, it is portable and easy to store when not in use. Master Lock is a reputable brand known for its reliable security products, which boosts confidence in this hitch lock's performance.

However, one potential drawback is that keyed locks can sometimes be less convenient than combination locks, especially if the keys are misplaced. Despite this, the Master Lock 379ATPY offers a robust and weather-resistant solution for trailer security.