ZIP Codes in Martinsburg, OH
Martinsburg uses 1 ZIP code, all in Knox County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Martinsburg ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 43037 | standard | Knox | 293 |
Finding a ZIP+4 in Martinsburg
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 Martinsburg 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 Martinsburg addresses and download it complete.