7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 77868 | Navasota | 18,863 |
| 77363 | Plantersville | 3,246 |
| 77831 | Bedias | 3,163 |
| 77830 | Anderson | 2,907 |
| 77861 | Iola | 2,785 |
| 77876 | Shiro | 144 |
| 77875 | Roans Prairie | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Grimes County, Texas (US Census).