Mailbox Map › United States › Granite City › Granite City Post Office
Post office · USPS
Granite City Post Office, Granite City
Granite City Post Office at Madison Avenue, Granite City, IL.
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| Address | Madison Avenue, Granite City, IL |
|---|---|
| Area | Granite City, Illinois |
| Coordinates | 38.70515, -90.13885 |
| Time zone | America/Chicago |
Mapped by the OpenStreetMap community, last checked 2026-06-20. Spotted a box that's gone? Fix it on OpenStreetMap and this page follows within a month.