9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 65265 | Mexico | 15,403 |
| 65240 | Centralia | 8,640 |
| 63382 | Vandalia | 4,167 |
| 63352 | Laddonia | 1,150 |
| 65264 | Martinsburg | 1,019 |
| 63345 | Farber | 393 |
| 65285 | Thompson | 379 |
| 65232 | Benton City | 280 |
| 65280 | Rush Hill | 277 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Audrain County, Missouri (US Census).