ZIP CodesZIP codes in Mason County, Illinois
Mason County, Illinois has 9 ZIP codes in this list, from 61532 to 62682. They cover 9 places, among them Forest City, Manito, Topeka and Bath.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 61532 | Forest City | 30.8 | 40.359, -89.833 |
| 61546 | Manito | 94.6 | 40.416, -89.790 |
| 61567 | Topeka | 50.8 | 40.330, -89.931 |
| 62617 | Bath | 61.7 | 40.154, -90.166 |
| 62633 | Easton | 67.1 | 40.228, -89.890 |
| 62644 | Havana | 96.6 | 40.300, -90.061 |
| 62655 | Kilbourne | 59.1 | 40.159, -90.004 |
| 62664 | Mason City | 107 | 40.202, -89.698 |
| 62682 | San Jose | 45.2 | 40.301, -89.687 |
The ZIP code areas of Mason County add up to about 613 square miles of land (1,587 sq km) as the Census Bureau draws them. The largest is 62664 (Mason City), with 107 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Forest City, IL 61532.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.