4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Gilmer | 1 | 5,262 | 4,856 | 1.56% | 1,388 | 3.79 | City |
| Holly Lake Ranch | 2 | 2,460 | 2,507 | -0.85% | 284 | 8.68 | CDP |
| Big Sandy | 3 | 1,359 | 1,231 | 1.95% | 837 | 1.62 | Town |
| Ore City | 4 | 1,215 | 1,114 | 1.67% | 563 | 2.16 | City |
Gilmer is the largest city in Upshur County, with a population of 5,262.
Ore City is the smallest city in Upshur County.
There are 4 cities in Upshur County, Texas.