23 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 60970 | Watseka | 5,965 |
| 60927 | Clifton | 2,239 |
| 60953 | Milford | 2,141 |
| 60955 | Onarga | 1,981 |
| 60938 | Gilman | 1,973 |
| 60948 | Loda | 1,838 |
| 60924 | Cissna Park | 1,707 |
| 60966 | Sheldon | 1,554 |
| 60911 | Ashkum | 1,215 |
| 60930 | Danforth | 816 |
| 60951 | Martinton | 732 |
| 60918 | Buckley | 633 |
| 60912 | Beaverville | 524 |
| 60928 | Crescent City | 509 |
| 60931 | Donovan | 468 |
| 60968 | Thawville | 453 |
| 60973 | Wellington | 382 |
| 60974 | Woodland | 333 |
| 60945 | Iroquois | 202 |
| 60956 | Papineau | 109 |
| 60926 | Claytonville | 53 |
| 60967 | Stockland | 0 |
| 60939 | Goodwine | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 23 ZCTAs in Iroquois County, Illinois (US Census).