10 Best Trailer Hitch Locks 2026 in the United States

The Rhino USA Trailer Hitch Lock Kit is a robust option for securing your trailer, RV, camper, or boat. Made from solid alloy steel, it offers strong resistance against theft. The heavy-duty powder-coated finish provides excellent protection against rust and corrosion, making it suitable for various weather conditions. This will ensure the lock remains durable and effective over time.

Compatibility is notable for 2-inch A-Frame couplers and specific 50x50 and 50x60 couplers, but it won't fit adjustable, Bulldog, ring/pintle, or 1-7/8-inch couplers. Therefore, it's crucial to check your trailer's coupler type before purchasing. Ease of use is enhanced by its simple locking mechanism, which should provide peace of mind knowing your property is secure.

The product is backed by a lifetime replacement warranty, which speaks volumes about the brand's confidence in their product and their commitment to customer satisfaction. Rhino USA, being a family-operated business, also emphasizes solid customer support. However, the product's weight of 1.89 pounds and compact dimensions (5x5x5 inches) make it easy to handle and store when not in use. Given its strong customer ratings (4.4 out of 5 stars from 1,606 reviews), it appears well-received by users. Those who need a heavy-duty, weather-resistant trailer hitch lock and have compatible couplers will find this an excellent choice. However, if your trailer uses a different type of coupler, this product won't be suitable for you.

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.

The Ft. Knox Curt Style Coupler/Hitch Trailer Lock is designed to secure common bumper pull trailers with a focus on strong protection. Made from 3/16" cold rolled steel, it offers solid resistance against bolt cutters and crowbars, which is a significant advantage for keeping your trailer safe from theft. Its bright yellow powder-coated finish functions as a clear warning to potential thieves, enhancing security by making the lock highly visible.

This lock fits specific Curt style couplers, so it is important to check your trailer’s hitch compatibility before purchasing. It includes a surround hasp that works with many puck-style locks for additional security, although the puck lock itself is not included, which may require an additional purchase. The size (9 x 5 x 5 inches) is fairly standard for these types of locks, but since it fits only certain couplers, it may not suit all trailers.

The powder-coated finish helps protect against rust and wear over time, contributing to weather resistance. The lock is made in the USA by a family-run business, adding a trustworthy aspect to the brand. However, its specialized fit limits its use to certain trailers, and needing a separate puck lock could increase overall cost. Additionally, while it is sturdy, it may be bulkier compared to simpler locks. For those with a Curt style coupler seeking strong, visible protection, this lock represents a solid option.