Founded in 1846, Calhoun County is one of 254 counties in the state of Texas. Historically, Calhoun County was formed from Jackson County, Matagorda County and Victoria County. The city of Port Lavaca is the county seat. With FIPS code of 57, Calhoun County has a population of 19,727 and area of 512 square miles (1,326 km2).
List of all cities in Calhoun County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Clarks, TX | 77979 | 361 |
| Green Lake, TX | 77979 | 361 |
| Indianola, TX | 77979 | 361 |
| Kamey, TX | 77979 | 361 |
| Long Mott, TX | 77979 | 361 |
| Magnolia Beach, TX | 77979 | 361 |
| Olivia, TX | 77979 | 361 |
| Point Comfort, TX | 77978 | 361 |
| Port Alto, TX | 77979 | 361 |
| Port Lavaca, TX | 77979 | 361 |
| Port O’ Connor, TX | 77982 | 361 |
| Seadrift, TX | 77983 | 361 |
| Weedhaven, TX | 77979 | 361 |