| County | County Seat |
| Andrews | Andrews |
| Borden | Gail |
| Crane | Crane |
| Dawson | Lamesa |
| Ector | Odessa |
| Gaines | Seminole |
| Glasscock | Garden City |
| Howard | Big Spring |
| Irion | Mertzon |
| Martin | Stanton |
| Midland | Midland |
| Mitchell | Colorado City |
| Reagan | Big Lake |
| Scurry | Snyder |
| Sterling | Sterling City |
| Upton | Rankin |
| Ward | Monahans |
| Winkler | Kermit |
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