9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 65265 | Mexico | 15,153 |
| 65240 | Centralia | 8,830 |
| 63382 | Vandalia | 4,033 |
| 63352 | Laddonia | 1,018 |
| 65264 | Martinsburg | 919 |
| 65285 | Thompson | 523 |
| 63345 | Farber | 291 |
| 65232 | Benton City | 256 |
| 65280 | Rush Hill | 121 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Audrain County, Missouri (US Census).