7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 77474 | Sealy | 14,846 |
| 77418 | Bellville | 10,467 |
| 77485 | Wallis | 3,865 |
| 78950 | New Ulm | 2,244 |
| 78944 | Industry | 672 |
| 78931 | Bleiblerville | 204 |
| 77473 | San Felipe | 32 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Austin County, Texas (US Census).