Best Cluster Mailboxes of 2025

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Cluster mailboxes are a convenient and secure way to receive mail in residential areas, apartment complexes, and commercial buildings. These mailboxes are designed to hold multiple mailboxes in one unit, providing a central location for mail delivery and pickup. They are made from durable materials such as aluminum, steel, and plastic and come in various sizes and styles to meet different needs. Cluster mailboxes are also USPS-approved, ensuring that mail is delivered safely and efficiently. They are an excellent solution for those looking for a convenient, secure, and cost-effective way to receive mail.
At a Glance: Our Top Picks
Top 10 Cluster Mailboxes
Salsbury Industries 3308BLK-U Cluster Box Unit
The Salsbury Industries 3308BLK-U Cluster Box Unit includes 8 "A" size doors, 2 parcel lockers, and a matching pedestal. Each door has a heavy duty 5 pin cylinder cam lock with a dust/rain shield and 3 keys. The unit also has a carrier access door for U.S.P.S. installed master lock.
Salsbury Industries Cluster Mailbox 3316
The Salsbury Cluster Mailbox offers practical features to enhance your mail management. It includes a designated "Outgoing Mail" compartment with a weather-resistant flap, ensuring your outgoing letters are protected from the elements. The mailbox also has a carrier access door designed for use with a U.S.P.S. master lock, providing secure access for mail delivery. Additionally, it comes with one or two integrated parcel lockers, which are perfect for receiving larger packages safely. To top it off, a matching pedestal is included, making installation easy and stylish.
Salsbury Industries Cluster Box Unit
This Cluster Box Unit by Salsbury Industries has 13 "B" size doors, 1 parcel locker with a small size of (12" W x 10" H), and a matching pedestal included. It also has a carrier access door with the U.S.P.S installed master lock and Type IV model # 3313 in black color. This product falls under the cluster mailbox category.
Salsbury Industries Gray Type II Cluster Box Unit Mailbox
This mailbox features 12 "A" size doors, a parcel locker, a matching pedestal, and a carrier access door for U.S.P.S. installed master lock. This Type II mailbox is designed for USPS access and comes in a gray color.
Salsbury Industries 2230 Aluminum Mailbox
The Salsbury Aluminum Mailbox is designed with durable 1/4" thick extruded aluminum doors, ensuring long-lasting use. The powder-coated finish not only enhances its appearance but also protects it from the elements, making it suitable for various environments like schools and military bases. Each door is equipped with a secure 5-pin cylinder cam lock, providing peace of mind for your mail security. With two keys included, you can easily share access with trusted individuals. This mailbox system is perfect for anyone needing a reliable and sturdy mail solution.
Salsbury Industries 3305GRY-U Cluster Box Unit
Salsbury Cluster Mailbox is a USPS-approved unit with convenient features. It includes an arrow lock approved by the U.S. postmaster general for secure installation. The unit has 2 parcel lockers for easy package storage. With C-sized compartments, you get extra space for your mail. Additionally, the 4 hook latches on each door provide protection against vandalism.
Salsbury Industries 3635AFU 4B+ Horizontal Mailbox
The Salsbury Industries 3635AFU 4B+ Horizontal Mailbox is available in different sizes and door configurations, including standard "A" size doors and larger "B" size doors. The doors come with a 5 pin cylinder cam lock and a front loading door panel that swings on a continuous hinge. The unit requires one mailbox opening for a master postal lock, which is installed by the U.S.P.S. and cannot be used for mail distribution. This mailbox is designed for cluster mailbox installations.
Salsbury Industries 3312BLK-U Mailbox
Salsbury Industries 3312BLK-U Mailbox is a Type II cluster box unit that features 12 A size doors, 1 parcel locker, and a matching pedestal which provides ample space for mail and packages. It also includes a carrier access door with a U.S.P.S. installed master lock, and meets the U.S.P.S. access standards.
Salsbury Industries Pedestal Mailbox with 12 Compartments and USPS Access
This Salsbury Industries cluster mailbox comes with 12 compartments, each with an "A" size door measuring 12-3/4" W x 3-1/8" H, as well as a small parcel locker measuring 12" W x 10" H. The mailbox also includes a matching pedestal and a carrier access door for the installed master lock, making it easy for U.S.P.S mail carriers to access. This Type II mailbox is designed for outdoor use and has a sandstone finish.
Salsbury 3305BLK-U Cluster Box Unit
The Salsbury Cluster Box Unit is a durable and secure mailbox option for residential or commercial use. This mailbox, made by Salsbury Industries, is approved by the U.S. postmaster general, ensuring its quality and reliability. With 2 fully integrated parcel lockers, this cluster box unit provides added convenience for receiving packages. The C-sized compartments offer ample space for mail and packages, with dimensions of 12 in. W x 6.5 in. H x 15 in. D. The 4 hook latches on each master door provide protection against vandalism, ensuring the safety of your mail. Constructed of welded, heavy-gauge aluminum and stainless-steel hardware, this mailbox is built to withstand various weather conditions, impacts, and vandalism. The Salsbury Cluster Box Unit is a reliable and secure choice for all your mailing needs.
Frequently Asked Questions (FAQs)
1. Does USPS provide cluster mailboxes?
Yes, USPS provides cluster mailboxes to customers. Each customer is given a compartment lock and three keys for their postal-owned Cluster Box Unit (CBU). There is no key deposit required, and customers can duplicate their keys at no expense to USPS.
2. Why do new homes have cluster mailboxes?
New homes often have cluster mailboxes because they offer increased security compared to traditional roadside mailboxes. Each tenant has a unique key to unlock their mailbox, and the cluster mailboxes have USPS-approved safety features to prevent mail theft. Additionally, cluster mailboxes allow for efficient USPS delivery.
3. Who decides on cluster mailboxes?
The responsibility of cluster mailboxes typically lies with the property manager or the community's Homeowners Association (HOA). They are in charge of regular upkeep and maintenance, including cleaning, paint touch-ups, repairing broken parts, and replacing mailbox units when necessary.
4. Does Amazon deliver to cluster mailboxes?
No, Amazon does not deliver to cluster mailboxes. USPS is the only package delivery service that uses cluster mailboxes. Other delivery services like FedEx, UPS, and Amazon deliver packages directly to the address specified on the mail piece, such as the front door of the recipient's home.
5. How much does it cost to install a cluster mailbox?
The cost of installing a cluster mailbox can vary. Prices range from around $1,000 for a unit with four doors and one or two parcel lockers, to approximately $2,200 for units with up to twenty doors. Additional pedestal parcel lockers may cost slightly less. It's important to consider other costs associated with installation as well.
6. How does USPS deliver to cluster mailboxes?
USPS delivers to cluster mailboxes using a proprietary Arrow lock. The postal carrier opens the entire front panel of the unit with this key, providing access to all individual mailboxes. USPS is responsible for installing and maintaining the Arrow locks.
7. How do mailmen open cluster mailboxes?
Mail carriers have a master key with an Arrow Lock that allows them to open all compartments at once. After delivering the mail, the carrier locks the CBU and each tenant retrieves their mail from their individual mailbox compartment and packages from the parcel lockers using their respective keys.
8. How are packages delivered to cluster mailboxes?
If a package is too large for a tenant's mailbox, the carrier places it in a parcel locker. A designated key for that locker is placed in the tenant's mailbox. The postal carrier then closes and securely locks the front panel door of the cluster mailbox unit.
During our cluster mailboxes research, we found 24 cluster mailboxes products and shortlisted 10 quality products. We collected and analyzed 3,965 customer reviews through our big data system to write the cluster mailboxes list. We found that most customers choose cluster mailboxes with an average price of $2,207.03.
The cluster mailboxes are available for purchase. We have researched hundreds of brands and picked the top brands of cluster mailboxes, including Salsbury Industries and more. The seller of top 1 product has received honest feedback from 5,384 consumers with an average rating of 4.5.

Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.