Best Large Post-Mount Mailboxes of 2026

The Mail Boss 7506 Mail Manager Curbside Locking Security Mailbox is a full-service residential locking mailbox that prevents mail-identity theft. It is made of 14- and 16-gauge galvanized welded steel construction which defends against vandalism. The innovative baffle door accepts small parcels, packages, and a box of checks and also deters fishing. It includes a patented Anti-Pry latch lock mechanism to prevent leveraged entry with a screwdriver & high security anti-drill, anti-pick 12-disc wafer lock. The package comes with a concealed outgoing mail clip, 3 keys, and required installation hardware.

The ARCHITECTURAL MAILBOXES Ironside Mailbox, model MB801BAM, is a heavy-duty post-mount mailbox made of galvanized steel. Its durable construction is designed to withstand vandalism and is nearly indestructible. The striking black powder-coated finish adds tolerance against outdoor climates, ensuring long-lasting performance. With its substantial large size, this mailbox can accommodate multiple deliveries, including packages and boxes. The magnetic door latch helps keep the door securely shut, while the recessed door prevents rain from entering. The ARCHITECTURAL MAILBOXES Ironside Mailbox is a reliable and convenient choice for anyone looking for a sturdy, spacious, and weather-resistant mailbox.

The Architectural Mailboxes Grand Haven Plastic, Mailbox and Post Kit is a durable and stylish solution for your mailbox needs. With its extra-large size, this mailbox provides ample space for all your packages. The impressive craftsman design and textured finish add a touch of distinction to your home. Made from heavy-duty, rust-proof plastic, this mailbox is built to last. The magnetic door latch ensures that your mail stays securely closed. The included post sleeve makes installation over a 4x4 wooden post quick and easy. Upgrade your mailbox with the Architectural Mailboxes Grand Haven and enjoy the convenience and durability it brings.

The USPS approved Architectural Mailboxes 6300B-10 Oasis 360 Locking Parcel Mailbox is an extra-large post-mount mailbox that measures 11.3 in. W x 11.5 in. H x 20 in. D, and accepts parcels ranging from 9.5 in. W x 12.6 in. L x 1.5 in. H to 9.5 in. W x 3.5 in. L x 2.5 in. H. Its dual door locking system and galvanized steel construction, which is fully powder coated inside and out, provide added corrosion resistance. Additionally, predrilled 4 in. x 10 in. mounting holes in the floor allow for easy installation.

The Plexon Jumbo Mailbox offers an extra-large capacity, making it perfect if you often receive multiple padded envelopes, packages, or boxes. This means you won’t have to worry about your mail being crammed or left outside. It also comes fully assembled with an adjustable door latch, so you can install it quickly and customize how securely it closes. The mailbox measures 15 inches high, 11.69 inches wide, and 24.82 inches long, giving you plenty of space without taking up too much room. Its ribbed body design adds strength and durability, while the powder-coated finish protects it from weather damage, keeping your mail safe no matter the season.

The Step2 Express Mailbox is a durable and weather-resistant post-mount mailbox that will enhance the curb appeal of any home. With its decorative mailbox post, recessed panels, and crown molding, it mimics the look of real woodwork without the maintenance. This mailbox is large enough to hold mail, large letters, magazines, and small packages, making it convenient for receiving all types of mail. It is also easy to install, with mounting hardware included and the option to mount it on a 4x4 post. Made with EverTough heavy-duty poly construction, this mailbox is fade, weather, and vandal resistant, ensuring its durability over time. Upgrade your mailbox with the Step2 Express Mailbox and enjoy both functionality and style.

The Architectural Mailboxes Oasis Classic Locking Post Mount Parcel Mailbox is Postmaster General approved and designed to allow delivery of mail bundles and small parcels, making it perfect for internet and catalog shoppers. The body is constructed of heavy 16 and 18 gauge galvanized steel that is fully powder coated for durability and long life. It also includes rubber seals on the doors to keep deliveries clean and dry, and is suitable for installation into a pilaster or column. The entire outer shroud is one piece to resist moisture and the elements, ensuring your mail is safe and secure.

The Step2 MailMaster Mailbox offers a spacious interior that accommodates not just your standard mail but also larger letters and small packages, making it perfect for busy households. You’ll appreciate the secure magnetic closure that keeps your items safe and protected. Designed to withstand various weather conditions, this mailbox features steel-plate reinforcement, ensuring stability during harsh winds. Assembly is a breeze; simply slide it over a 4x4 wooden post, and you’re set to go. With all the necessary hardware included, you can have it ready for use in no time.

The Architectural Mailboxes MailMax™ is a sturdy, galvanized steel mailbox designed for outdoor use. Its 4 in. x 10 in. mounting hole pattern makes installation easy, fitting all compatible top-mount posts so you can set it up quickly. Built to last, it offers excellent durability against weather and daily wear, ensuring your mail stays safe. The black powder-coated finish adds a strong layer of rust resistance, protecting the mailbox from the elements. Plus, its spacious interior gives you plenty of room for both letters and multiple packages without looking bulky at your curb, making it a practical and stylish choice for your home.