Gaines County, Texas
Gaines County  | |
|---|---|
The Gaines County Courthouse in Seminole  | |
Location within the U.S. state of Texas  | |
Texas's location within the U.S.  | |
| Coordinates: 32°44′N 102°38′W / 32.74°N 102.64°W | |
| Country | United States | 
| State | Texas | 
| Founded | 1905 | 
| Seat | Seminole | 
| Largest city | Seminole | 
| Area | |
 • Total  | 1,503 sq mi (3,890 km2) | 
| • Land | 1,502 sq mi (3,890 km2) | 
| • Water | 0.5 sq mi (1 km2) 0.03% | 
| Population  (2020)  | |
 • Total  | 21,598 | 
| • Density | 14/sq mi (5.5/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Congressional district | 19th | 
| Website | www | 
Gaines County is a county in the U.S. state of Texas. As of the 2020 census, its population was 21,598. The county seat is Seminole. It gained national attention in 2025 for a major outbreak of measles.