5 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 62960 | Metropolis | 10,783 |
| 62910 | Brookport | 1,993 |
| 62956 | Karnak | 1,172 |
| 62908 | Belknap | 440 |
| 62953 | Joppa | 259 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 5 ZCTAs in Massac County, Illinois (US Census).