ZIP Codes in Aberdeen Proving Ground, MD
Aberdeen Proving Ground uses 1 ZIP code, all in Harford County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Aberdeen Proving Ground ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 21005 | standard | Harford | 2,202 |
Finding a ZIP+4 in Aberdeen Proving Ground
Knowing which of these 1 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Aberdeen Proving Ground street almost always have different ZIP+4 codes even though they share all five leading digits.
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