| Locality | Post Code |
|---|---|
| Anderson, Grimes | 77830 |
| Bedias, Grimes | 77831 |
| Carlos, Grimes | 77830 |
| Iola, Grimes | 77861 |
| Navasota, Grimes | 77868 |
| Plantersville, Grimes | 77363 |
| Richards, Grimes | 77873 |
| Roans Prairie, Grimes | 77875 |
| Shiro, Grimes | 77876 |
| Singleton, Grimes | 77831 |
| Todd Mission, Grimes | 77363 |
| White Hall, Grimes | 77868 |