Durable Heavy Duty Mailboxes

The Last Mailbox
You'll Ever Need.

Built like a fortress. Backed by a lifetime of durability.
Shop Now

Over 30 years of High-Security You Can Trust

We are Fort Knox Mailbox — All others are just mailboxes!
For more than three decades, our high-security mailboxes have been crafted from heavy-duty steel and engineered to stand up to harsh weather, real-world tampering, and daily use. With advanced locking systems, premium finishes, and a design built for lasting protection, Fort Knox Mailbox helps secure your mail and packages while adding strength and curb appeal to your home. Every detail is built for durability, security, and decades of reliable performance.

Shop for Durable Mail & Package Boxes

High Security Mailboxes
High Security Mailboxes
Secure Package Receptacles
Secure Package Receptacles
CBUs & Multiple Mailboxes
CBUs & Multiple Mailboxes
Fee and Payment Boxes
Fee and Payment Boxes
Security, style, and craftsmanship in every detail.
Built for Life and Designed for You

Your mailbox should do more than just hold your mail, it should protect it, complement your home, and last for years to come. Our heavy-duty designs are built to withstand the harshest weather, resist tampering, and add a touch of sophistication to your curbside.

Every curve, hinge, and finish is crafted with precision to deliver both function and beauty. Whether you’re receiving important documents, cherished letters, or valuable packages, you can trust that they’re safe and secure.

Choose a mailbox that reflects your style, supports your lifestyle, and stands the test of time.

→ Find Your Perfect Mailbox

We Are Fort Knox Mailbox

How We Make Our Boxes

The Durability Test

We Call This One The Crush

Here's Why Our Customers Love Our Mailboxes

Trusted by Homeowners Worldwide

★★★★★

Safety, security, functionality and course good looks at the top of my list. Fort Knox hits all the above. WOW, Thanks Guys and Gals for the quality products that you produce. I would 100% recommend this mailbox to everyone. 

— Sue P.
★★★★★


I am very happy with the construction as well as the workmanship. 

So far everyone that has seen it - has the wow! response in terms of the workmanship and weight. 

I just hope it does not get tested - smile. 

In closing please tell your staff in the shop - job well done even the packing. 

— Russ
★★★★★


Our old mailbox was constantly getting damaged. This one is built like a fortress — and it looks amazing.

— James Carter
★★★★★

This mailbox is INSANE!!! Forget worrying about your mail, if some kid was so stupid to hit this with a bat, he would get vibration/shakes just like the cartoons do…

— Carl P.
★★★★★

I have the Vault XXXL. Even though it is 8 years old – still looks new, solid and rust free. Great for mail and small packages – keeps the deliveries secure.

— Raymond N.
★★★★★

Some want-to-be thief tried to open our mailbox. The attempt was a good one as they tried both the lock and wedging open the door, all to no avail. While our mailbox is no longer as pretty as it once was, it is still better than any other mailbox on market!

— Jean M. P.
★★★★★

I ordered your rear-access style mailbox, & it’s been great now that I don’t have to stand in the road to open the mailbox.

— Will B.
★★★★★

First of all, let me start by saying that you guys have the best mailboxes I have ever seen. I am so happy that I found you guys on the internet.

— Rivera J.
Connecticut, USA
★★★★★

I purchased one of your mailboxes 3 years ago. Each of my neighbors have spent at least as much money on “fortifying” off the shelf boxes. Each of my neighbors also continuously have their boxes broken into. There are crowbar marks on my box but not even the slightest dent in the door. This box is built like “Fort Knox” indeed.

— Mark W.