ZIP Codes in Caseyville, IL
Caseyville uses 1 ZIP code, all in St. Clair County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Caseyville ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 62232 | standard | St. Clair | 7,063 |
Finding a ZIP+4 in Caseyville
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 Caseyville 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 Caseyville addresses and download it complete.