Founded in 1836, Colorado County is one of 254 counties in the state of Texas. Historically, Colorado County was one of the original 23 counties. The city of Columbus is the county seat. With FIPS code of 89, Colorado County has a population of 20,630 and area of 963 square miles (2,494 km2).
List of all cities in Colorado County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Alleyton, TX | 78935 | 979 |
| Altair, TX | 77412 | 979 |
| Borden, TX | 78962 | 979 |
| Columbus, TX | 78934 | 979 |
| Eagle Lake, TX | 77434 | 979 |
| Elm Grove, TX | 77434 | 979 |
| Garwood, TX | 77442 | 979 |
| Glidden, TX | 78943 | 979 |
| Hillcrest, TX | 78934 | 979 |
| Nada, TX | 77460 | 979 |
| Oakland, TX | 78951 | 979 |
| Osage, TX | 78962 | 979 |
| Rock Island, TX | 77470 | 979 |
| Sheridan, TX | 77475 | 979 |
| Weimar, TX | 78962 | 979 |