ZIP Codes in Franklin Grove, IL
Franklin Grove uses 1 ZIP code, all in Lee County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Franklin Grove ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 61031 | standard | Lee | 1,492 |
Finding a ZIP+4 in Franklin Grove
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 Franklin Grove 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 Franklin Grove addresses and download it complete.