19 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 63116 | Saint Louis | 42,470 |
| 63109 | Saint Louis | 25,743 |
| 63118 | Saint Louis | 25,645 |
| 63139 | Saint Louis | 21,811 |
| 63108 | Saint Louis | 20,692 |
| 63111 | Saint Louis | 19,093 |
| 63104 | Saint Louis | 18,701 |
| 63112 | Saint Louis | 18,353 |
| 63110 | Saint Louis | 17,725 |
| 63115 | Saint Louis | 14,252 |
| 63113 | Saint Louis | 11,610 |
| 63107 | Saint Louis | 9,082 |
| 63103 | Saint Louis | 8,927 |
| 63147 | Saint Louis | 8,229 |
| 63106 | Saint Louis | 7,742 |
| 63120 | Saint Louis | 7,227 |
| 63102 | Saint Louis | 3,004 |
| 63101 | Saint Louis | 2,953 |
| 63155 | Saint Louis | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 19 ZCTAs in St. Louis city, Missouri (US Census).