| Zip Code | City | Population ↓ |
|---|---|---|
| 62914 | Cairo | 1,880 |
| 62990 | Thebes | 1,155 |
| 62988 | Tamms | 1,141 |
| 62957 | McClure | 655 |
| 62969 | Olive Branch | 342 |
| 62962 | Miller City | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 6 ZCTAs in Alexander County, Illinois (US Census).