| Zip Code | City | Population ↓ |
|---|---|---|
| 77868 | Navasota | 17,559 |
| 77363 | Plantersville | 3,177 |
| 77831 | Bedias | 3,095 |
| 77861 | Iola | 2,921 |
| 77830 | Anderson | 2,815 |
| 77876 | Shiro | 175 |
| 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).