7 Best Locking Mailboxes 2025 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 3504ARU Recessed Mounted Vertical Mailbox is designed primarily for multi-family homes and cluster settings, making it a practical choice for residential complexes or office buildings needing secure mail delivery. One of its notable strengths is the durable aluminum construction, which not only provides reliability but also weather resistance, ensuring that your mail stays protected from the elements. The striated doors and trim are an excellent feature, as they help resist scratches, keeping the mailbox looking good over time.

Security is another highlight with the inclusion of a 5-pin cylinder cam lock, providing decent protection against unauthorized access. Having two keys included with the mailbox adds convenience for users. With options for 3 to 7 compartments, this mailbox adapts well to various needs, allowing for flexibility based on the number of residents or offices it serves.

On the downside, the recessed mounting style may not suit every location, as it requires a specific installation set-up that might not be practical for all users. Additionally, while the aluminum material is strong, some may prefer a heavier-duty option if they live in areas with extreme weather conditions or potential vandalism. The size and capacity of the mailbox, although adequate for most users, could be limiting for those who receive a high volume of mail or larger packages. The Salsbury Industries 3504ARU offers solid security and functional design, making it a strong option for those in need of a reliable locking mailbox.