Best Trailer Locks: Top 10 for Ultimate Security

What are the best trailer locks to keep your trailer safe?
Discover our expertly reviewed selection of the top
10 trailer locks
designed to provide you with security and peace of mind for your RV, boat, or cargo trailer.

Trailer locks are essential for keeping your trailer safe and secure. Whether you own an RV, boat, or cargo trailer, a reliable lock gives you peace of mind. We’ve tested and reviewed the best trailer locks to help you choose the right one.

These locks come in various designs and sizes, fitting different trailer couplers. From heavy-duty steel to keyless entry, there’s a lock for every need. We’ll guide you through the top options so you can make an informed decision.

Get ready to discover the perfect trailer lock for your needs. Our guide is simple, clear, and easy to follow. Let’s keep your trailer safe together!

List of Top 10 Trailer Locks

Title	Best For	Price
METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock, Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8″,2”, 2-5/16″ Coupler Yellow	This trailer coupler lock is perfect for anyone who owns a trailer. Whether you’re hauling boats, RVs, or cargo, it keeps your trailer secure and safe from theft.	View on Amazon (paid link)
Rhino USA Trailer Hitch Lock Kit (for 2″ Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV, Camper, Trailer, Boat, Caravan – Reinforced Solid Steel Tow Lock for Trailer Tongue	This Rhino USA Trailer Hitch Lock Kit is perfect for anyone who owns a trailer, boat, or RV. It’s easy to use and keeps your property safe from theft.	View on Amazon (paid link)
Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY	This Master Lock Trailer Hitch Lock is perfect for anyone who owns a trailer, RV, or vehicle. It’s easy to use and keeps your valuables safe.	View on Amazon (paid link)
RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch, 2 Inch, 2-5/16 Inch Couplers, Bright Yellow, Light Weight	The RETRUE Universal Coupler Lock is perfect for anyone who wants to keep their trailer safe. It’s easy to use and fits most couplers, making it great for all trailer owners.	View on Amazon (paid link)
Pomunty 3 Pack Puck Lock for Trailers Keyed Alike, 6061 Solid Aluminum Trailer Door Locks Hockey Puck Locks, Reinforced Hidden Shackle Padlocks for Trailers Trucks Vans Shed Gates w/6 Keys	This lock is perfect for people who need strong and reliable security for their trailers, trucks, vans, or sheds. It’s great for fleet owners or anyone who wants easy access with one key.	View on Amazon (paid link)
Rhino USA Trailer Hitch Lock Kit (for 2-5/16″ Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV, Camper, Trailer, Boat, Caravan – Reinforced Solid Steel Tow Lock for Trailer Tongue	This Rhino USA Trailer Hitch Lock Kit is perfect for RV, camper, trailer, and boat owners who want top-notch security for their valuable equipment. It offers robust protection against theft, giving you peace of mind wherever your adventures take you.	View on Amazon (paid link)
Master Lock 605DAT Shackle 15/16″ Length x 7/16″ Inner Width, 2″ Body Width, Solid Brass Coupler Lock	This Master Lock is perfect for anyone who wants to keep their trailer hitch safe. It’s great for outdoor use and stands up to bad weather.	View on Amazon (paid link)
ONNAIS Full Metal RV Keyless Entry Door Lock with Password & Remote, Fits Most Trailers and 5th Wheels, Ideal Gifts for RV Owners	This RV keyless entry door lock is perfect for RV owners who want easy access and top security. It’s great for light travelers and those who share their RV with friends or service crews.	View on Amazon (paid link)
Master Lock – (3) Keyed Alike Universal Trailer Coupler Locks w/6 Keys, 379KA-3	This Master Lock set is perfect for trailer owners who need multiple locks with just one key. It’s great for protecting your trailer from theft and works with most coupler sizes.	View on Amazon (paid link)
RETRUE Trailer Tongue Coupler Lock, Trailer Hitch Lock,Dia 1/4 Inch, 3/4 Inch Span for Tow Boat RV Truck Car’s Coupler, Black	This RETRUE Trailer Tongue Coupler Lock is perfect for anyone who owns a trailer, boat, RV, truck, or car. It’s easy to use and keeps your trailer safe from theft.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 trailer locks handpicked for maximum security and durability. Each lock is expert-reviewed and customer-approved, ensuring you find the perfect fit for your needs. From heavy-duty steel to keyless entry, these locks offer unmatched protection for your trailer. Read on to find the best trailer lock that keeps your valuables safe and sound.

1. METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock, Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8″,2”, 2-5/16″ Coupler Yellow

METOWARE Trailer Coupler Lock Universal Adjustable Heavy-Duty Steel Trailer Hitch Lock, Anti Theft Trailer Ball Lock Towing Lock for Towing Trailer Security Fits 1-7/8

The METOWARE Trailer Coupler Lock is a heavy-duty anti-theft device for trailers. It has an all-metal construction with a bright yellow color for high visibility. This lock is made for durability and security.

This lock fits 1-7/8”, 2”, and 2-5/16” couplers. It has an adjustable ratchet design with 11 locking positions.

The lock’s premium zinc alloy tubular core makes it extra secure. It also has all-weather protection with rubber caps and anti-corrosion zinc plating. This ensures the lock lasts in all conditions.

Pros	Cons
Unbeatable trailer security. Fits all popular hitch sizes. Simple to lock and unlock. Tough and weatherproof design.	Bright yellow color may not suit all trailer aesthetics. No included keys for replacement if lost. Bulkier design might limit storage options.

Perfect For:

This trailer coupler lock is perfect for anyone who owns a trailer. Whether you’re hauling boats, RVs, or cargo, it keeps your trailer secure and safe from theft.

Ready to Purchase?

View Price on Amazon (paid link)

2. Rhino USA Trailer Hitch Lock Kit (for 2″ Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV, Camper, Trailer, Boat, Caravan – Reinforced Solid Steel Tow Lock for Trailer Tongue

The Rhino USA Trailer Hitch Lock Kit keeps your trailer safe. It is heavy duty and built to last. The lock is easy to use.

It fits 2″ trailer couplers and some 50×50 or 50×60 couplers. It does not fit adjustable or smaller couplers.

The powder-coated finish protects against rust and weather. It comes with a lifetime replacement for full peace of mind.

Pros	Cons
Lifetime replacement ensures peace of mind for your purchase. Heavy-duty steel protects against theft and harsh weather. Rust-resistant finish keeps the lock durable and reliable. Family-owned business with top-notch customer support.	Not for all trailer types. May not fit some coupler sizes.

Perfect For:

This Rhino USA Trailer Hitch Lock Kit is perfect for anyone who owns a trailer, boat, or RV. It’s easy to use and keeps your property safe from theft.

Ready to Purchase?

View Price on Amazon (paid link)

3. Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY

This is a strong trailer lock. It fits many hitch sizes with ease. It keeps your trailer safe at all times.

It has a smart lock design. It helps stop picking and prying.

The body is made of zinc metal. It fights rust and wear in all weather. It comes with two keys for easy use.

Pros	Cons
Fits most couplers, securing RVs, trailers, and more. Advanced lock resists picking and prying for top security. Zinc construction prevents rust and corrosion, lasting longer. Two keys included for convenient access and backup.	No anti-theft alarm for added security. Keys can get lost, leaving lock unusable. Zinc may wear over time with heavy use.

Perfect For:

This Master Lock Trailer Hitch Lock is perfect for anyone who owns a trailer, RV, or vehicle. It’s easy to use and keeps your valuables safe.

Ready to Purchase?

View Price on Amazon (paid link)

4. RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch, 2 Inch, 2-5/16 Inch Couplers, Bright Yellow, Light Weight

RETRUE Universal Coupler Lock Trailer Locks Ball Hitch Trailer Hitch Lock Adjustable Security Heavy-Duty Steel Fits 1-7/8 Inch, 2 Inch, 2-5/16 Inch Couplers, Bright Yellow, Light Weight

The RETRUE Universal Coupler Lock keeps your trailer safe and secure. It fits 1-7/8”, 2”, and 2-5/16” couplers with 11 locking positions. The bright yellow color makes it easy to spot and deters thieves.

Made with heavy-duty steel and aluminum, this lock is rustproof and weatherproof. Its upgraded lock cylinder and thicker keys ensure maximum security.

Enjoy peace of mind with a 120-day warranty. Reliable after-sales service is available 24/7 for any questions or issues.

Pros	Cons
Universal fit for most trailer hitches. Bright yellow for high visibility. Heavy-duty steel for ultimate security. Rustproof and weatherproof design. Easy to use and lightweight.	Bright yellow color may not suit all trailer styles. No anti-theft alarm feature included for added security. Keys could get lost, requiring careful storage.

Perfect For:

The RETRUE Universal Coupler Lock is perfect for anyone who wants to keep their trailer safe. It’s easy to use and fits most couplers, making it great for all trailer owners.

Ready to Purchase?

View Price on Amazon (paid link)

5. Pomunty 3 Pack Puck Lock for Trailers Keyed Alike, 6061 Solid Aluminum Trailer Door Locks Hockey Puck Locks, Reinforced Hidden Shackle Padlocks for Trailers Trucks Vans Shed Gates w/6 Keys

Pomunty 3 Pack Puck Lock for Trailers Keyed Alike, 6061 Solid Aluminum Trailer Door Locks Hockey Puck Locks, Reinforced Hidden Shackle Padlocks for Trailers Trucks Vans Shed Gates w/6 Keys

This Pomunty 3 Pack Puck Lock is built from high-strength 6061 solid aluminum for maximum durability. It resists cuts and wear much better than standard locks, making it ideal for securing trailers, cargo vans, and more. The lock is also lighter than other steel options.

The lock features a 6-pin cylinder mechanism for strong protection against picking and drilling. Its hidden shackle design makes it resistant to bolt cutters and prying tools. This design offers excellent security for your valuables.

The keyed alike feature allows you to use the same key for all locks. The locks are also weatherproof and rust-resistant. Long-lasting and reliable.

Pros	Cons
Tough aluminum resists cuts and wear, outlasting standard locks. Hidden shackle blocks bolt cutters and prying tools for top security. Weatherproof design fights rust, perfect for outdoor use in all conditions. Keyed-alike set simplifies access with just one key for multiple locks.	Not for all trailers; check size before buying. Limited use due to hidden shackle design. Lighter than steel; not heavy-duty.

Perfect For:

This lock is perfect for people who need strong and reliable security for their trailers, trucks, vans, or sheds. It’s great for fleet owners or anyone who wants easy access with one key.

Ready to Purchase?

View Price on Amazon (paid link)

6. Rhino USA Trailer Hitch Lock Kit (for 2-5/16″ Trailers) Heavy Duty Anti Theft Trailer Coupler Locks for RV, Camper, Trailer, Boat, Caravan – Reinforced Solid Steel Tow Lock for Trailer Tongue

The Rhino USA Trailer Hitch Lock Kit keeps your trailer, boat, or RV safe from theft. Made of reinforced solid steel, it’s built to last. Its heavy-duty powder coat protects against rust and harsh weather.

It fits 2-5/16″ couplers and select 50×50 or 50×60 sizes. Plus, it comes with a lifetime replacement guarantee for peace of mind.

Pros	Cons
Secure your trailer with heavy-duty protection. Built tough against rust and weather. Peace of mind against trailer theft. Lifetime replacement for total confidence.	Not universal: Doesn’t fit all coupler types, check before buying. Heavy duty: Bulkier design may be harder to handle. Specific fit: Limited compatibility with certain trailer sizes.

Perfect For:

This Rhino USA Trailer Hitch Lock Kit is perfect for RV, camper, trailer, and boat owners who want top-notch security for their valuable equipment. It offers robust protection against theft, giving you peace of mind wherever your adventures take you.

Ready to Purchase?

View Price on Amazon (paid link)

7. Master Lock 605DAT Shackle 15/16″ Length x 7/16″ Inner Width, 2″ Body Width, Solid Brass Coupler Lock

Keep your trailer secure with the Master Lock 605DAT Coupler Lock. This solid brass lock is built tough for trailer hitch protection.

Its precision pin tumbler mechanism offers top-notch security against picking. Plus, it’s weather-resistant, fighting off rust and corrosion for lasting outdoor use.

The case-hardened steel shackle resists cutting. It’s durable and reliable.

Pros	Cons
Solid brass ensures long-lasting durability for outdoor use. Precision pin tumbler offers superior pick resistance for security. Weather-resistant design prevents rust and corrosion effectively. Case-hardened steel shackle resists cutting and sawing attempts.	No key cover leaves keyhole exposed to dirt and debris. Brass body may scratch or dent under heavy impact. Limited shackle size might not fit all hitch designs.

Perfect For:

This Master Lock is perfect for anyone who wants to keep their trailer hitch safe. It’s great for outdoor use and stands up to bad weather.

Ready to Purchase?

View Price on Amazon (paid link)

8. ONNAIS Full Metal RV Keyless Entry Door Lock with Password & Remote, Fits Most Trailers and 5th Wheels, Ideal Gifts for RV Owners

Upgrade your RV security with the ONNAIS Full Metal RV Keyless Entry Door Lock. This robust lock offers unbeatable protection against forced entry, ensuring your adventures are always secure. Its weatherproof design guarantees long-lasting durability, while a single battery keeps it powered for up to 2 years.

Enjoy ultimate convenience with the included FOB, allowing you to unlock your RV from up to 100 feet away. For quick trips, the keypad entry lets you get inside without any keys or FOBs. You can even share temporary access with others, making it perfect for guests or service providers.

This lock boasts a peek-proof keypad for ultimate code security. It also features a backlit keypad for easy nighttime use. Plus, it comes with an all-in-one installation kit and a lifetime warranty.

Pros	Cons
Full-metal security resists prying, kicking, and forced entry. Unlock from 100 feet with the FOB—no keys needed. Backlit, peek-proof keypad keeps your code safe and visible. All-in-one kit includes everything for easy installation. Lifetime warranty ensures worry-free, long-lasting use.	No left-hinge option, limits use for some RV doors. Battery replacement needed, though it lasts up to 2 years. Mechanical key hidden, could be tricky to access in a rush.

Perfect For:

This RV keyless entry door lock is perfect for RV owners who want easy access and top security. It’s great for light travelers and those who share their RV with friends or service crews.

Ready to Purchase?

View Price on Amazon (paid link)

9. Master Lock – (3) Keyed Alike Universal Trailer Coupler Locks w/6 Keys, 379KA-3

Keep your trailer safe and secure with this 3-pack of universal coupler locks from Master Lock. You get three locks that all open with the same key, making it super convenient if you need to lock multiple trailers. Plus, they’re built tough to stop thieves.

These locks fit most trailer hitches. They are easy to use. They offer great protection.

The reinforced zinc die-cast construction means these locks can handle rust and corrosion, and they’re designed to resist hammer strikes and prying. With a rekeyable cylinder and an advanced locking mechanism, your trailer will be well-protected.

Pros	Cons
Three locks, one key convenience. Universal fit for most trailer hitches. Tough design resists hammer attacks. Rust-proof zinc for lasting strength.	Not keyed alike when buying multiple 3-packs. Heavy at 2.4 lbs each, might be bulky for some. No anti-drill protection mentioned in features.

Perfect For:

This Master Lock set is perfect for trailer owners who need multiple locks with just one key. It’s great for protecting your trailer from theft and works with most coupler sizes.

Ready to Purchase?

View Price on Amazon (paid link)

10. RETRUE Trailer Tongue Coupler Lock, Trailer Hitch Lock,Dia 1/4 Inch, 3/4 Inch Span for Tow Boat RV Truck Car’s Coupler, Black

The RETRUE Trailer Tongue Coupler Lock is a must-have for securing your trailer. It fits most couplers with its 1/4-inch pin and 3/4-inch span.

Made of high-strength zinc alloy, it resists rust and wear. The padlock design adds extra security to keep your trailer safe.

It’s easy to use with a simple 1/4-turn lock. Two keys are included for your convenience. Contact us anytime for 24/7 support.

Pros	Cons
Universal fit for most trailer couplers, ensuring wide compatibility. High-strength materials provide maximum security against theft. Easy 1/4-turn lock for quick and convenient use. Corrosion-resistant finish ensures long-lasting durability. Two keys included for added convenience and peace of mind.	No weatherproof claim, may rust in harsh conditions. Limited span (3/4 inch) might not fit all couplers. Basic keys included, no advanced security features.

Perfect For:

This RETRUE Trailer Tongue Coupler Lock is perfect for anyone who owns a trailer, boat, RV, truck, or car. It’s easy to use and keeps your trailer safe from theft.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Trailer locks keep your trailer safe and secure. Choosing the right one is easy with our guide. Let’s find the perfect lock for you!

Factors to Consider When Buying Trailer Locks

Compatibility:
Make sure the lock fits your trailer coupler size. Common sizes are 1-7/8”, 2”, and 2-5/16”.
Material:
Look for heavy-duty steel or solid aluminum for durability. These materials resist rust and wear.
Security Features:
Choose locks with anti-theft designs, like hidden shackles or advanced locking mechanisms, to keep thieves away.
Weather Resistance:
Opt for locks with weatherproof coatings or rubber caps to protect against rain, snow, and sun.
Visibility:
Bright colors like yellow make locks easy to spot and act as a deterrent to thieves.
Ease of Use:
Locks with keyless entry or simple locking mechanisms save time and hassle.
Warranty and Support:
Look for locks with warranties or lifetime replacements for added peace of mind.
Price and Value:
Balance cost with features. A reliable lock is an investment in your trailer’s safety.

With these tips, you’ll find the best trailer lock for your needs. Stay secure and enjoy your adventures!