23 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 60970 | Watseka | 6,025 |
| 60953 | Milford | 2,444 |
| 60927 | Clifton | 2,233 |
| 60955 | Onarga | 1,877 |
| 60948 | Loda | 1,741 |
| 60938 | Gilman | 1,718 |
| 60966 | Sheldon | 1,600 |
| 60924 | Cissna Park | 1,590 |
| 60911 | Ashkum | 1,206 |
| 60930 | Danforth | 768 |
| 60951 | Martinton | 759 |
| 60918 | Buckley | 622 |
| 60931 | Donovan | 594 |
| 60912 | Beaverville | 565 |
| 60928 | Crescent City | 559 |
| 60968 | Thawville | 516 |
| 60973 | Wellington | 406 |
| 60974 | Woodland | 310 |
| 60945 | Iroquois | 242 |
| 60956 | Papineau | 122 |
| 60926 | Claytonville | 76 |
| 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).