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Secure Your Trailer with These Top Trailer Hitch Locks

A trailer hitch lock or coupler lock is one of the easiest and least expensive ways to deter thieves from taking off with your RV trailer. There are many hitch locks, and choosing the best one for you can be hard. That’s why we’re looking at 12 best hitch locks to secure your RV. There are many trailer hitch locks on the market. We have taken the time to research and only recommend the best of the best. 

So you may be asking:

What is a trailer hitch lock? Or What is a Trailer Coupler Lock?

A trailer hitch lock is a lock that is used to secure trailers. This lock can protect your trailer when you unhitch it. Some locks tie your trailer to your tow vehicle, making it harder for thieves to steal it. Let’s face it; if thieves want something bad enough, they will stop at nothing to have it. Trailer hitch locks will hopefully deter them from trying to steal your trailer.


There are two types of trailer locks, i.e., receiver lock and coupler lock

Trailer Receiver Lock: Use a receiver lock when the trailer is attached to the tow vehicle. Not only does this help to secure your trailer from would-be thieves, but also as a safety measure. You never know when you might hit a pothole which could cause the hitch to be unattached from the tow vehicle. 

Trailer Coupler lock: is used when the trailer is not attached to the tow vehicle. The Coupler lock is an excellent deterrent for thieves.


The Best Trailer Coupler Locks on the Market

1. AMPLOCK U-BRP2516 RV/Trailer Coupler Lock (fits 2 5/16 inches Coupler)

AMPLOCK U-BRP2516 RV trailer Lock protects your trailer or caravan (RV) with the best coupler lock; AMPLOCK’s exclusive locks are the most durable and reliable on the market today. various models are molded to fit the specific shape of your trailer coupler when unhitched, so your AMPLOCK lock is the perfect theft deterrent.

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Customer Reviews


All other locks are a joke compared to this one, worth it if you don’t want your trailer stolen.

Massive & Formidable Lock




2. AMPLOCK U-TLS2 : 2” Boat Trailer Lock/Trailer Coupler Lock/RV Lock

With the AMPLOCK U-TLS2, you will protect your trailer, boat, or caravan (RV) with the best coupler lock. AMPLOCK’s exclusive locks are the most durable and reliable on the market today. Our various models offer you the proper protection for your goods, so your AMPLOCK lock is the perfect theft deterrent.

Size: 2” ( Trailer Ball Size )

Easy Installation

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Customer Reviews:

They tried to cut it off!

There’s a trick to getting it on!

Any attempted defeat would take a thief a long time with special tools.





3. CURT 23081 Powder-Coated Aluminum Trailer Tongue Lock, 2-5/16-Inch Couplers

A safety pin and coupler latch alone is not enough to keep your toys safe. The Curt coupler securely latches onto your trailer ball, and there is no substitute for the locking power provided by a CURT coupler lock. CURT coupler locks are an added security to your trailer and towing equipment. Instead of merely retaining the coupler latch mechanism, this unique coupler lock system protects your trailer from theft when not hitched up to your vehicle.

It features a robust aluminum body that fits most 2-5/16″ and some 2″ flat or rolled-lip couplers and prevents a trailer ball from being inserted. This CURT coupler lock is key-operated and comes with a grey powder coat finish. 

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What Customers are saying about the Curt Trailer Tongue Lock.

It fits a wide cup!

It’s a good value for the price. It will discourage the average thieves, but you’ll need to invest in more security if you want to stop the determined thieves.

I purchased this lock for my 28″ travel trailer. The receiver is more triangular, and the different products I purchased did not fit. The CURT trailer lock fits like a glove. It’s easy to install and remove. The powder coat takes well and is simple to lock and unlock.




4. VULCAN Trailer Security Bundle | King Pin Lock and Glad Hand Lock – Protects Any RV, Equipment or Class 8 Trailer

The heavy-duty kingpin lock stops any big rig or RV trailer theft by preventing the kingpin from mating with a 5th wheel. It is physically impossible for the trailer to connect with a 5th wheel while the lock is engaged, and the heavy-duty steel lock covers the entire kingpin for total security.

Made of heavy-duty construction
The solid steel cuff and kingpin lock are tough to defeat and engineered specifically for maximum tamper resistance. The forged locking pin is solid and cannot be disengaged without the key to the lock. Each set includes a slide bolt lock and two keys.

Strong Deterrent
The last thing a trailer thief wants to see is a heavy-duty Vulcan king pin lock. Once the would-be thief sees the lock, they will almost always move on to an easier target. Vulcan is known for providing some of the most complicated lock systems to defeat in the world, and the kingpin lock is no exception.

extremely durable
The heavy-duty steel cuff and lock cylinder have a high gloss stainless steel finish to resist the elements. This lock is designed to last for years.

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What others are Saying about the VULCAN Trailer Security Lock

It is built well. The only issue is, that the lock needs to be flipped. It would make for a tight fit for the key to be inserted, but it would eliminate the ability to drill out the lock. As it is, the lock is easily accessible and can be drilled quickly. Like every other lock, it’s only deterring the lazy thieves. If the lock were more protected, this would be a 5-star product.

The lock works fine, but the chain started rusting immediately.




5. BOYISEN 5th Wheel King Pin Lock Solid Steel Anti Theft for RVs, Container Trailers and Campers with Handles Warning Tag

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6. Fastway Fortress 86-00-5015 Maximum Security Universal Coupler Lock for 1 7/8 Inch, 2 Inch and 2 5/16 Inch Couplers

Security Universal Trailer Coupler Lock for 1-7/8″, 2″, and 2-5/16″ Couplers This versatile coupler lock accommodates three different sizes of couplers: 1-7/8″, 2″, and 2-5/16″. Its innovative features include a horizontally bent, chrome-plated shackle protected by a corrosion-resistant, nickel-plated housing. This coupler lock provides an anti-drill pin and a bolt-blocked locking system for heightened security.


I own five trailers and have one for each! They lock up nice and tight and are hard to pick! I lost a key two years ago, and the locksmith took over 45 minutes to drill and drill and drill to get it off my trailer finally! The trick is to put the lock to the rear, and it was a bear for the locksmith to even get to the lock, and then to drill was very difficult! Great locks for me!

The lock fits securely to the coupler of my Featherlite trailer, with a 2 5/16″ ball size. I decided that I needed some security to prevent someone from simply hooking up to my trailer and driving away with it, and I’m hopeful that this will do the job.


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7. Black Trailer Hitch Coupler Lock with 2 Keys, Universal Coupler Lock, Adjustable Storage Security, Heavy-Duty Steel.


The Lock is a bit too small for our RV hitch, so it’s not as snug as we want. My brother-in-law got one also, and the same issue is that it’s not as snug as you would want and has to fit tilted.

My biggest dislike is keeping the key turned to slide the Lock up and down. It also seems about 1/8″ smaller than the 4″ advertised. Not a deal-breaker, but bothersome. Overall, Lock seems sturdy and is a keeper.


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8. AMPLOCK U-TLS2516G Airstream RV Coupler Lock/Trailer Coupler Lock (fits 2 5/16 inches Coupler only)


A battery-powered grinder can remove a padlock.
A large hammer can shatter many cast locks.
This thing is a beast! Special security key.

The Lock is Heavy duty and well made. The Lock Fits well on our 2016 Bambi Sport 16.


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9. KAYCENTOP King Pin Heavy Duty 5th Wheel Trailer Hitch Lock

Protect your trailer with our newly improved heavy-duty 5th wheel king pin lock. Improved design for higher security, solid, high-quality steel is impossible to destroy—a full brass cylinder with two keys. Higher security and bright warning yellow color move theft to easier ones.


Great looking lock that’s a good color. People can see it and avoid hitting your pin or move on it attempting to jack your rig. Easy to install, great value.

Great fit on my 5th wheel, and I now feel more secure leaving it at storage.


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10. Trimax UMAX50D Universal Dual Purpose Trailer Coupler and U-Lock

New Dual Purpose Design acts as a Universal Coupler Lock and a Universal U-Lock! Three hundred sixty degrees of solid steel protection against trailer theft. The UMAX50D is constructed of solid hardened steel and heat-treated aluminum. It fits most coupler sizes (1 7/8″ to 2 5/16″). A 5/8″ (16mm) hardened steel shackle helps ensure your trailer is secure, even when left unattended. It has a patented dual locking system and a rust-proof hammer-tone epoxy finish for extra security.


It molds perfectly with the round shape of the ball-like coupler. And a tip that I learned from the one that broke is to add a little WD40 on the teeth (both sides) for smooth operation and to prevent rust.

The lock looks and feels solid. Perfect condition and in original package. Two round-shaped keys are provided.


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11. KAYCENTOP Heavy Duty Fifth Kingpin Lock Steel 5Th Wheel Security Anti Theft King Pin Lock Heavy Duty Fifth Kingpin Lock Steel 5Th Wheel Security Anti Theft King Pin Lock with Highly Visible Red Caution Tag Great Deterrent for Trailers Tractor RV

Protect your trailer with our newly improved 5th wheel king pin lock. Improved design for higher security, solid, high-quality steel is impossible to destroy—a full brass cylinder with two keys. Higher security and bright warning yellow color move theft to easier ones.


It Hooks n easily as long as you have the key in the lock first. Both keys work.

Great fit on my 5th wheel, and I now feel more secure leaving it at storage.


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12. Master King Pin Lock-Toy Hauler/Trailer Locks w/BumpStop Technology – 387NKA

This durable high, security keyed kingpin lock protects your trailers and their cargo. This lock includes two keys. The reality is that trailer theft is quite prevalent throughout the United States and around the world. 

Many kingpin locks are ineffective in preventing complete trailer/container theft. For a practical theft deterrent, look to Master Lock, the most recognizable and trusted locking company in the industry today.


This lock system appeared to be very well made and solid. Caution: if your kingpin requires a Capture Plate, this lock may not be for you as it will not fit around the collar due to the locking mechanism on the capture plate

It fits on my fifth-wheel travel trailer perfectly and is very stout!


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List of The Best Trailer Receiver Locks on the Market.


1. METOWARE Keyed Alike Trailer Hitch Receiver& Coupler Lock Kit, 5/8” Dia 3-1/2” Long Trailer Hitch Lock Receiver Pin Lock for Class III-IV Receiver, 1/4” Dia Trailer Coupler Lock with 3/4” Inch Span

That said, this feels good and clean when it clicks locked. (The hitch receiver bolt, that is.) It feels solidly made, it comes with about ten rubber o-rings to keep it from rattling back and forth in your hitch, and it comes with a trailer hitch lock and four keys total. Good wow! Seriously though, I’m happy about all this.

The Locks work perfectly in my F250 Super Duty 2020 with a 2.5″ receiver and in my trailer RV. Nice that the four keys all work in both locks.

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2. Trimax MAG200 Resettable Combination Bent Pin 5/8″ Receiver Lock

Trimax MAG200 Resettable Combination Bent Pin 5/8" Trailer Receiver LockTrimax MAG200 Dare to compare! TRIMAX, the leader in Receiver Locking Pins, has spent the last ten years expanding and improving on the “ORIGINAL.” The Patented Dual Lock Lug Design offers over 5,800 lbs. of head pull strength.

A 1/4 turn of the rugged tube key locks & unlocks the most robust locking pin on the market. Don’t settle for low-quality knockoffs! The MAG200 is made of high-quality chrome-plated machine-hardened steel.

Provides instant security for your camper, boat, or trailer by securing your vehicle receiver hitch and features a resettable combination lock. Durable non-corrosive lock mechanism. Forged steel lock tip. Triple chrome-plated steel pin. Heavy-duty collar overlaps hitch pin for unmatched strength and security—standard bent pin style design with resettable combination lock.

Excellent lock pin for 2-inch hitch receiver. Set it up in 5 minutes and would never need to worry about keys. Put some WD-40 in the lock for additional rust protection. Lock spin wheels work smoothly and are easy to operate, even in gloves.

I would recommend this to anyone in need of simple hitch protection.

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3. ISTUNT Silver Trailer Hitch Lock 5/8″ Pin with 3 Keys Truck Trailer Receiver for 2″ Towing Receiver

I have had another one for 15 years, and it still works.

Excellent quality. Very satisfied with the purchase.

Used to lock a hitch in place for an F150 – fits perfectly


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4. MICTUNING Trailer Hitch Receiver Lock Pin Set – Dual Bent Pin Style 1/2 and 5/8 Diameter Hitch Pin Kit Fits Class I II III IV 1-1/4″ 2″ and 2-1/2″ Receiver

MICTUNING Trailer Hitch Receiver Lock Pin Set - Dual Bent Pin Style 1/2 and 5/8 Diameter Hitch Pin Kit Fits Class I II III IV 1-1/4" 2" and 2-1/2" ReceiverMICTUNING 1/2″ and 5/8″ Trailer Hitch Pin Lock Set: – Dual Bent Pin Style, share with One Locking System. 1/2″ pin & 5/8″ pin with 3-1/2″ effective length, perfect for all class I/II 1-1/4″ and Class III/IV 2″, 2-1/2″ hitch receiver tubes

Safer Tubular Lock: Unlike the old simple lock, our upgraded zinc alloy tubular lock core adopts more advanced anti-theft technology than before; tubular key instead of a standard flat key is much safer to use. The simple push-to-lock mechanism and 1/4 key turn make it convenient to use

Anti Theft: The trailer hitch lock can lock into your trailer, keep it secure, and protect the hitch from thieves. The standard bent pin style design creates a helpful handle for easier use, and also allows the pin to fit snugly and securely in the hitch connection.

Solidly Built, More Durable: – This towing hitch lock is made of high-strength steel with a black powder coat finish, solid and hard to bend, ANTIWEAR, RUSTPROOF, and CORROSION RESISTANT. The watertight dust cap keeps the keyhole away from moisture, dust, and rust, ensuring a longer service life.

Universal Application: – Perfect for 1.25 Inch, 2 Inch, and 2.5 Inch receivers on the trailer, truck, RV, car, and boat. Compatible with hitch ball mount, hitch rack, cargo hitch tray, hitch ball, bike rack, and tow rope

Product Included:

1x 1/2″ Diameter Lock Pin
1x 5/8″ Diameter Lock Pin
1x Lock Head
2x Tubular keys


Works great! I liked the push to lock on the end of the hitch when it’s unlocked.

Great lock but a little tight to lock

Great product. It gives you the option for different size hitches. The black is nice and sleek. It looks smooth, and the cover for the keyhole should keep it rust-free. These locks are harder to pick as well.

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5. KAYCENTOP Hitch Receiver Pin Lock Trailer Locking 5/8 Inch Pin Security Hitch Locks Fit 2 inch 2.5 inches Hitch Receiver Class III-IV Hitches 2 Pack Black Anti-Theft Anti-Noise 3 Tubular like Keys

KAYCENTOP Hitch Receiver Pin Lock Trailer Locking 5/8 Inch Pin Security Hitch Locks Fit 2 inch 2.5 inches Hitch Receiver Class III-IV Hitches 2 Pack Black Anti-Theft Anti-Noise 3 Tubular like KeysUniversal: Extra-long hitch 5/8″ pin lock fits 2-inch and 2.5-inch tow receivers (Class III, IV). With the help of rubber rings and a safety clip, it makes it easy to use and helps to improve stability.

High-Security: Heavy-duty hitch lock is made of high-quality one-piece black chrome-plated hardened steel, with no welding. High-strength hitch lock keeps your hitch bike rack and ball mount from stealing.

Easy to use: 360-degree rotating head and push-to-lock design are easy for you to lock or remove. The lock cylinder will automatically pops-up by 1/4 key turning—better and more secure than a hitch pin.

Anti-Noise Hitch lock: Safety spring clip & anti-rattle O-Rings keep rattles down and stop shaking for the hitch lock while driving; help to lock 2 inches and 2.5-inch towing hitch receivers tightly.

Packaged Included: Hitch lock 5/8″ pin set contains 2 x black hitch lock with a waterproof rubber cover, 2 x safety spring clips, 10 x rubber O rings, 3 x tubular like keys, 1 x user instruction. 1-year warranty.

Great product. The best feature is the keyless locking system. No need to insert a key and turn it to lock. A simple push of a button and it’s secure.

Ez to use and sturdy not a lot of ruckus coming from the hitch.

It’s adjustable for any truck

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Reese Towpower 7014700 Tow 'N Store Lock Kit6. Reese Towpower 7014700 Tow ‘N Store Lock Kit, Yellow

REESE Towpower tow and store anti-theft lock kit include the necessary locks to provide the complete security needed when towing or storing a trailer. Included is a universal coupler lock that secures the trailer when not in use—a brass coupler lock allows the coupler to be locked when connected to the tow vehicle. And a dual bent pin receiver lock fits both 5/8 Inch and 1/2 Inch—receivers, which allows the ball mount to be locked to the hitch.


This kit seems sturdy. I liked that it had three keys, and all locks were keyed alike. The tongue lock fits perfectly for my 5×8 mower trailer but may be too small for bigger trailers.

5.0 out of 5 stars Complete Set, Completely what you need for a trailer.


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7. CZC AUTO Trailer Hitch Receiver Lock, Padlock Style and Swivel Head, Dia 5/8 Inch Bent Pin for Class III-IV 2 2-1/2 Inch Receiver, Fits Bike Rack Tray Ball Mount for Towing Trailer Truck Car Boat RV


The only negative thing about this lock issue is you have to make sure it has clicked in all the way. Please give it a yank to ensure it is securely locked; otherwise, it’s a fantastic product.

If they want to steal it, they will. It looks tuff. At this price, you can’t complain. I wish the lock body were something other than aluminum. Fit and function work well.


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8. Motormic Trailer Hitch Lock Pin Set – 5/8″ and 1/2″ Extra Long Black Pins with One Locking System – 1 Safety Clip, 10 Anti Rattle O-Rings – Tow receivers 1.25″, 2″ and 2.5 inches (Class I, II, III, IV, V)


Solid well made feel, worked great, and highly recommended!

It works like a charm and doesn’t make the hitch receiver rattle.

Well made but needs an improvement to the protective lock cap.


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