Founded in 1836, San Augustine County is one of 254 counties in the state of Texas. Historically, San Augustine County was one of the original 23 counties. The city of San Augustine is the county seat. With FIPS code of 405, San Augustine County has a population of 7,922 and area of 528 square miles (1,368 km2).
List of all cities in San Augustine County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Blandlake, TX | 75972 | 936 |
| Broaddus, TX | 75929 | 936 |
| Denning, TX | 75972 | 936 |
| Fords Corner, TX | 75972 | 936 |
| Macune, TX | 75972 | 936 |
| Norwood, TX | 75972 | 936 |
| San Augustine, TX | 75972 | 936 |
| Sexton, TX | 75972 | 936 |
| White Rock, TX | 75972 | 936 |