2 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| San Augustine | 1 | 1,816 | 1,911 | -0.87% | 385 | 5 | City |
| Broaddus | 2 | 181 | 187 | -0.55% | 485 | 0 | Town |
San Augustine is the largest city in San Augustine County, with a population of 1,816.
Broaddus is the smallest city in San Augustine County, with a population of 181.
There are 2 cities in San Augustine County, Texas.