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Commercial Mailboxes - USPS & private delivery

If you’re shopping for a commercial mailbox, choose US Mail Supply. Our online mailbox store is convenient if you know exactly what you want, but if you don’t, our friendly, knowledgeable staff will make orders over the phone easy. Need a custom configuration? We can help you with that too!

US Mail Supply specializes in mailboxes for every application – homes, offices, apartment buildings, colleges, military facilities, medical centers, and more.

Commercial Mailboxes for USPS Delivery

Commercial Mailboxes - USPS Delivery

Browse all commercial indoor and outdoor mailboxes built for USPS access. Some models are USPS approved and others are USPS approved for replacement only. Always check with your local postmaster for local requirements for USPS commercial mailboxes.

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Commercial Mailboxes for USPS Delivery

Commercial Mailboxes - Private Delivery

Shop all commercial mailboxes for private delivery or centralized distribution. Many mailbox models are built for USPS access by default but also offer models for private distribution.

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Cluster Mailboxes for Commercial Buildings

Cluster Mailboxes

Unique vintage style lockable decorative cluster commercial mailbox units are a perfect addition for luxury apartment complexes or condos & town house subdivisions.

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Commercial Outdoor Mailboxes

Outdoor Commercial Mailboxes

Outdoor commercial mailboxes for sale at U.S. Mail Supply include curbside pedestal mount cluster mailboxes and large contemporary decorative metal mailboxes.

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Commercial Indoor Mailboxes

Indoor Commercial Mailboxes

Shop recessed, wall-mounted indoor horizontal and vertical commercial-grade mailboxes for small and large businesses and multi-unit residences.

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Commercial Horizontal Mailboxes

Horizontal Mailboxes

Shop recessed, wall-mounted indoor horizontal and vertical commercial-grade mailboxes for small and large businesses and multi-unit residences.

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Commercial 4C Horizontal Mailboxes

4C Horizontal Mailboxes

Steel and aluminum heavy metal construction makes commercial USPS approved 4C horizontal mailboxes a tough-as-nails option for apartments, offices, condos, schools, municipal buildings and multi-family residences.

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Commercial 4C Depot Mailboxes

4C Depot Mailboxes

US Mail Supply offers secure locking 4C Horizontal depot mailboxes for apartments and business parks. They come in many styles and sizes – from decorative style free-standing mailboxes to classic style commercial mailboxes.

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Commercial 4C Pedestal Mailboxes

4B+ Vertical Mailboxes

We offer metal commercial vertical mailboxes from 3 slots to 7 slots. Recess wall mount and surface mountable options available.

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Commercial Postal Drop Boxes

Postal Drop Boxes

Packages and letters are safe in pedestal-mounted secure, locking commercial drop boxes and letter lockers available for sale from U.S. Mail Supply.

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USPS Approved Commercial Mailboxes

USPS Approved Mailboxes

All USPS approved mailboxes - these units are manufactured to comply with USPS standards. But it's always a good idea to check with your local postmaster for USPS requirements in your area before installation.

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Commercial Office Mailboxes

Office Mailboxes

Shop metal office mailboxes for employees, built tough against heavy use in hectic commercial environments.

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USPS Commercial Mailbox Requirements

USPS commercial mailbox requirements dictate all new construction and major renovations must meet STD-4C specifications. New STD-4C specifications meet ADA standards and outline new size dimensions. USPS approved commercial mailboxes ensure safe delivery of mail and parcels, and are perfect for strip malls, office buildings, and more.


Choose USPS Approved or private delivery commercial mailboxes

U.S. Mail Supply offers USPS-approved commercial mailboxes and commercial mailboxes for private delivery to give you versatile options for public and internal deliveries. Mix and match free-standing outdoor pedestal-mounted mailboxes or recess wall mounted indoor vertical/horizontal mailboxes to supply seamless USPS delivery or private internal document exchange or employee storage.

Apartment Complexes – Condos – Mobile Home Communities – and All Multi-Tenant Living Buildings in Between

Give your tenants accessibility and convenience with a single purchase.

Purchasing a commercial mailbox for your apartment or multi-tenant living structure will improve the appearance of your building and make it easier for everyone to collect their mail. Having one place for everyone’s mail eliminates multiple trips for both tenants and postal workers – making it infinitely more convenient than going out of the way to separate locations. Choose from private use-only mailboxes and USPS-approved mailboxes. Cluster mailboxes are also more secure than traditional roadside residential mailboxes. US Mail Supply provides both outdoor cluster pedestal mailbox options and indoor horizontal and vertical mailbox units, both with superior fortification against identity theft and vandalism.

Multi Business Office Buildings & Strip Malls

Organization is key to success – give your business the edge it needs.

If you’re installing a replacement indoor mailbox or simply looking for a high-quality unit for a newly built office complex, US Mail Supply has what you need. Our horizontal indoor mailbox options include open-back modules for private mail delivery only as well as USPS-approved 4C modules. If the configurations shown on our site don’t meet your exact needs, we will custom-configure a mailbox unit that does. Easily accessible and secure mail is of the utmost importance to businesses – keep your tenants and budget happy by shopping with US Mail Supply.

If your tenants are spread across a strip mall, an outdoor pedestal mailbox is a more ideal solution for your postal mail needs. Installed in a convenient, safe location for the stores and businesses leasing your space, our mailboxes are weather and vandal resistant.  

The size of our mailboxes gives ample room for letters and comes with separate reinforced parcel compartments for extra security against vandals and even general wear and tear.

Need Supplies, Equipment, or Furniture for your Office Mailroom?

Successful businesses keep their mailrooms organized with top-quality supplies and equipment so their offices and employees receive mail quickly and safely – allowing your business to operate at peak efficiency. Mail contains important and often time-sensitive documents, making sure your employees have the most security available for their mail and an orderly place for it to be sorted is essential to running a well-coordinated mailroom and office. US Mail Supply can help you ensure your employees have what they need to be as productive as possible.

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College Dorms & Housing – University Offices

Simplify the mailing process AND relieve stress.

Our commercial mailboxes are perfect for any University or College in need of an efficient mail organization solution. Designed to be accessed only by those you choose; vandals, thieves, and not even the harsh weather will get through to what’s secured in these sturdy mailbox modules. With tons of customization options to choose from, we have the right mailbox for your needs. If you don’t see what you want on our site, let us know what you need and we’ll get or custom configure it for you! Outdoor pedestal-mounted cluster mailboxes are ideal for student housing that is independent of dorms, and our indoor horizontal units are best for large dormitories. Take the stress off your staff in charge of mail organization and distribution and improve efficiency with commercial mailboxes from US Mail Supply.

Military & Government Facilities

The perfect mailing solution.

No matter your government facility – military, medical, or anything in between – US Mail Supply has the best mailbox solution for your needs, big or small. Whether you are catering to a military training facility that needs small item storage cabinets, duplex housing that would benefit from outdoor pedestal units, or a hospital in need of a small, secure horizontal module to ensure the critical client information received is safe, you’ll find what you’re looking for on our site. If you need a custom configuration, it’s as simple as giving us a quick call!

Shop all mailboxes for sale from our online store.


Make sure to choose the RIGHT mailbox.

Don't worry, we can help you figure out what's best and most cost efficient for your space. A representative at U.S. Mail Supply will help you figure out what is required for USPS or private delivery, the number of units you need and any information required for installation.