ZIP Codes in Green Castle, MO
Green Castle uses 1 ZIP code, all in Adair County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Green Castle ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 63544 | standard | Adair | 1,159 |
Finding a ZIP+4 in Green Castle
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 Green Castle 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 Green Castle addresses and download it complete.