Where to Get a Replacement Mailbox Key

The fastest way to replace a mailbox key depends on who owns the box. If you rent and your mailbox came with your apartment or house, contact your landlord or property manager — they usually have a master key or can order a replacement from the manufacturer. If you own a standalone mailbox, you will need to contact the manufacturer directly with your mailbox model number, or visit a local locksmith who can cut a new key if you have the original lock cylinder.

For USPS cluster mailboxes (the tall metal boxes on sidewalks), you cannot get a replacement key yourself. The postal carrier has access, and you can ask them to retrieve mail from your box while you arrange a new key. If your key was lost at a USPS facility, report it to your local post office and they will note it in your account.

Private mailbox services like UPS Store or Mailboxes Etc. will replace keys on the spot if you have your rental agreement and photo ID. Call ahead to confirm they have the key blank in stock for your box model.

Key Takeaways

  • Landlords and property managers can usually provide a replacement key when ready or order one from the mailbox manufacturer.
  • Standalone mailbox owners should contact the manufacturer with the model number, or hire a locksmith to rekey the lock cylinder.
  • USPS cluster mailboxes require a visit to your local post office, where staff can retrieve your mail while you arrange a replacement.
  • Private mailbox rental services replace keys during business hours if you show your rental agreement and photo ID.
  • A locksmith can cut a new key from the lock cylinder itself if you cannot locate the original key code.

Finding Your Mailbox Model Number

The model number is usually stamped or embossed on the mailbox body itself, often on the back or bottom. Look for a series of letters and numbers that identifies the manufacturer and style. Take a photo of this number before you contact anyone, because you will need it to order the correct key blank.

If the number is worn away or you cannot find it, describe the mailbox to the manufacturer's customer service: the material (metal or plastic), the mounting style (wall-mounted, post-mounted, or pedestal), and the approximate age. They can often narrow it down to one or two models and tell you which key blank will work.

Contacting the Manufacturer

Most mailbox manufacturers have a customer service phone line or website where you can order replacement keys. Common brands include Salsbury Industries, Architectural Mailboxes, and Gibraltar Mailboxes. Search the manufacturer's name plus "replacement key" to find their ordering page or phone number.

When you call or order online, have the model number ready and expect to pay between $5 and $20 for a replacement key, depending on the lock type. Standard keys ship within a few business days. Some manufacturers will cut a key from a photo of your lock cylinder if you cannot find the model number, though this takes longer.

Using a Locksmith as an Alternative

A locksmith can cut a new key directly from your lock cylinder without needing the original key or model number. Bring the mailbox (or just the lock cylinder if it is removable) to the locksmith, and they will create a matching key on the spot. This usually costs $10 to $25 and takes 15 to 30 minutes.

If your mailbox is permanently mounted, some locksmiths will come to your home, though this adds a service call fee of $50 to $100. Call ahead and ask whether they can work from a photo of your lock or if they need to see it in person.

Rekeying Your Mailbox Lock

If you have lost the key and want to prevent anyone else from using an old key, you can have the lock cylinder rekeyed instead of replaced. A locksmith removes the cylinder, changes the internal pins, and gives you a new key that works only with the new pin configuration. The old key will no longer open the box.

Rekeying costs roughly the same as buying a replacement key from the manufacturer — $10 to $25 — but gives you the security of knowing the old key is useless. This is most useful if you lost the key in a public place or suspect someone may have copied it.

What to Do If You Cannot Find the Lock Cylinder

Some mailboxes have the lock permanently welded or riveted to the body and cannot be removed. If this is your situation, you will need to order a replacement key from the manufacturer or have a locksmith drill out the old lock and install a new one. Drilling and installing a new lock costs $30 to $60 and requires the locksmith to have the correct replacement lock in stock.

Before paying for a new lock installation, contact the manufacturer to confirm that a replacement key cannot be cut. Some locks look permanent but can actually be removed with the right tool, and the manufacturer can tell you whether yours is one of them.

Preventing Future Key Loss

Keep a spare key in a find location separate from your primary key — a safe deposit box, a trusted family member's home, or a locked drawer at work. Label it clearly so you know what it opens. If you have a rental mailbox, ask the property manager or service whether they keep a spare on file.

If you have multiple keys (mailbox, garage, front door), use a key tag or label maker to mark them so you know which is which. A lost key without identification is harder to replace because you cannot prove it is yours.

Frequently Asked Questions

How long does it take to get a replacement key from the manufacturer?

Standard replacement keys ship within three to seven business days once you place the order. Expedited shipping is sometimes available for an extra fee. If you need a key urgently, a locksmith can cut one the same day if you bring the lock cylinder or mailbox to their shop.

Can I use a regular house key blank to open my mailbox?

No. Mailbox locks use different key profiles and pin configurations than residential door locks. A key that looks similar will not turn the cylinder. You must use a key cut specifically for your mailbox model.

What if I lost my key at the post office?

Report the loss to your local post office when ready. Staff will note it in your account and can retrieve mail from your cluster box for you while you arrange a replacement. If the key was lost on postal property, the post office may have it — ask them to check their lost and found.

Is it cheaper to replace the lock or get a new key cut?

Getting a new key cut is almost always cheaper — usually $10 to $25 versus $30 to $60 for a new lock. Replace the lock only if the cylinder is damaged, the key blank is no longer made, or you want to rekey for security reasons.

Do I need the original key to get a replacement?

No. A locksmith can cut a key from the lock cylinder itself, and many manufacturers can cut a key from a photo of your lock or from the model number alone. You do not need the original key to get a working replacement.