4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Augustine | 1 | 1,832 | 1,913 | -0.87% | 388 | 5 | City |
| San Augustine | 2 | 1,832 | 1,911 | -0.87% | 388 | 5 | City |
| Broaddus | 3 | 182 | 187 | -0.55% | 488 | 0 | Town |
| Broaddus | 4 | 182 | 187 | -0.55% | 488 | 0 | Town |
San Augustine is the largest city in San Augustine County, with a population of 1,832.
Broaddus is the smallest city in San Augustine County, with a population of 182.
There are 4 cities in San Augustine County, Texas.