Mailbox Map › United States › Lanark › Chadwick Post Office
Post office · USPS
Chadwick Post Office, Lanark
Chadwick Post Office at 218 North Main Street, Chadwick, IL 61014.
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| Address | 218 North Main Street, Chadwick, IL 61014 |
|---|---|
| Area | Lanark, Illinois |
| Coordinates | 42.01390, -89.89118 |
| 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.