ZIP Codes in Annapolis, MD
Annapolis uses 5 ZIP codes, all in Anne Arundel County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 5 Annapolis ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 21401 | standard | Anne Arundel | 38,629 |
| 21402 | standard | Anne Arundel | 4,303 |
| 21403 | standard | Anne Arundel | 32,681 |
| 21405 | standard | Anne Arundel | 495 |
| 21409 | standard | Anne Arundel | 20,289 |
Finding a ZIP+4 in Annapolis
Knowing which of these 5 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 Annapolis street almost always have different ZIP+4 codes even though they share all five leading digits.
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