ZIP CodesZIP codes in Piatt County, Illinois
Piatt County, Illinois has 10 ZIP codes in this list, from 61813 to 61936. They cover 10 places, among them Bement, Cerro Gordo, Cisco and De Land.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 61813 | Bement | 63.9 | 39.922, -88.569 |
| 61818 | Cerro Gordo | 39.0 | 39.868, -88.726 |
| 61830 | Cisco | 33.6 | 39.997, -88.696 |
| 61839 | De Land | 32.4 | 40.111, -88.639 |
| 61854 | Mansfield | 56.4 | 40.215, -88.518 |
| 61855 | Milmine | 11.7 | 39.924, -88.660 |
| 61856 | Monticello | 108 | 40.026, -88.569 |
| 61884 | White Heath | 24.1 | 40.101, -88.519 |
| 61929 | Hammond | 39.3 | 39.795, -88.579 |
| 61936 | La Place | 3.0 | 39.798, -88.727 |
The ZIP code areas of Piatt County add up to about 411 square miles of land (1,065 sq km) as the Census Bureau draws them. The largest is 61856 (Monticello), with 108 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Bement, IL 61813.
- 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.