| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| O'Donnell | 1 | 748 | 706 | 0.94% | 870 | 1 | City |
| Los Ybanez | 2 | 19 | 22 | -5% | 229 | 0 | City |
O'Donnell is the largest city in Borden County, with a population of 748.
Los Ybanez is the smallest city in Borden County, with a population of 19.
There are 2 cities in Borden County, Texas.