7 Best Locking Mailboxes 2026 in the United States

The Salsbury Industries 3316BLK-U is a solid choice for those in need of a functional and secure locking mailbox, particularly for multi-family settings or cluster box installations. Made from durable aluminum, it boasts weather resistance, ensuring that your mail stays safe from the elements. The design includes an outgoing mail compartment with a protective flap, which is a thoughtful feature for users who frequently send mail. It also has 16 A size doors and can integrate one or two parcel lockers, making it suitable for those who receive larger packages frequently. The accompanying pedestal for mounting adds stability and ease of access.

One of the standout features is the U.S.P.S. access with a master lock, which is essential for ensuring that your mailbox is both secure and compliant with postal requirements. The mailbox is relatively heavy at 155 pounds, which may be a consideration for installation but contributes to its stability.

There are a few drawbacks to keep in mind. The weight could pose some challenges during installation, especially for those who are not handy. While it has a straightforward design, some users might find the aesthetic too utilitarian compared to more decorative options available on the market.

The Salsbury Industries 3308BLK-U is a sturdy, black aluminum cluster box unit designed for outdoor professional use. It features 8 compartments with 'A' size doors and 2 parcel lockers, one small and one large, providing ample space for mail and packages. The pedestal-mounted design ensures stability and ease of access. The heavy-duty 5 pin cylinder cam lock, which includes a dust and rain shield, adds a significant level of security, making it ideal for areas that require secure mail handling.

Additionally, it includes a carrier access door for U.S.P.S. installed master lock, ensuring compatibility with postal services. The black finish and rectangular shape offer a modern, professional appearance suitable for multi-family residences or commercial properties. However, at 145 pounds, the unit is quite heavy, which may complicate installation and require significant effort to set up. While the aluminum material provides durability and weather resistance, users should ensure proper maintenance to avoid any wear and tear over time.

The product also comes with a 5-year limited warranty, adding peace of mind. With positive customer reviews and a good ranking in its category, this mailbox unit is a solid choice for those needing a reliable and secure cluster box solution.

The Salsbury Industries 3505ZSU is a solid choice if you need a secure, wall-mounted mailbox cluster, especially for multi-family or shared mail delivery. Made from aluminum, it offers good durability and resistance to weather, which means it should hold up well outdoors without rusting. The bronze finish gives it a classic, rural look that fits well in many settings.

Each of the five individual compartments is roomy enough for regular letters and small packages, measuring about 5.5 inches wide, 16 inches high, and 6.75 inches deep. The mailbox uses 5-pin cylinder cam locks, which provide decent security and come with two keys per door to keep mail safe from theft. Installation is straightforward with included mounting hardware, and the front-access design allows easy mail retrieval.

It meets USPS standards for cluster boxes but might be too large if you only need one or two compartments. The locks are standard and could be replaced with higher-security options if extra protection is desired. This mailbox cluster serves as a dependable, weather-resistant option for communal mail areas or multiple users wanting individual locked compartments in one unit.