| Zip Code | City | Population ↓ |
|---|---|---|
| 60450 | Morris | 20,729 |
| 60416 | Coal City | 9,372 |
| 60424 | Gardner | 2,309 |
| 60444 | Mazon | 1,928 |
| 60407 | Braceville | 1,581 |
| 60474 | South Wilmington | 684 |
| 60479 | Verona | 676 |
| 60437 | Kinsman | 88 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Grundy County, Illinois (US Census).