| Zip Code | City | Population ↓ |
|---|---|---|
| 35120 | Odenville | 17,730 |
| 35146 | Springville | 13,973 |
| 35004 | Moody | 12,155 |
| 35125 | Pell City | 11,279 |
| 35128 | Pell City | 10,546 |
| 35953 | Ashville | 7,083 |
| 35054 | Cropwell | 4,593 |
| 35131 | Ragland | 3,363 |
| 35987 | Steele | 2,861 |
| 35135 | Riverside | 1,718 |
| 35052 | Cook Springs | 191 |
| 35112 | Margaret | 120 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in St. Clair County, Alabama (US Census).