| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Stephenville | 1 | 21,956 | 21,108 | 0.75% | 1,812 | 12 | City |
| Dublin | 2 | 3,414 | 3,366 | 0.41% | 952 | 4 | City |
Stephenville is the largest city in Erath County, with a population of 21,956.
Dublin is the smallest city in Erath County, with a population of 3,414.
There are 2 cities in Erath County, Texas.