4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jacksboro | 1 | 4,893 | 4,182 | 2.49% | 677 | 7 | City |
| Runaway Bay | 2 | 2,406 | 1,557 | 6.27% | 956 | 3 | City |
| Bryson | 3 | 489 | 429 | 2.09% | 372 | 1 | City |
| Lake Bridgeport | 4 | 412 | 337 | 3.26% | 882 | 0 | City |
Jacksboro is the largest city in Jack County, with a population of 4,893.
Lake Bridgeport is the smallest city in Jack County, with a population of 412.
There are 4 cities in Jack County, Texas.