ZIP Codes in Dover, DE
Dover uses 2 ZIP codes, all in Kent County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Dover ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 19901 | standard | Kent | 37,763 |
| 19904 | standard | Kent | 38,818 |
Finding a ZIP+4 in Dover
Knowing which of these 2 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 Dover street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of Dover addresses and download it complete.