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.
- Country
- United States
- Inception
- 1876
- Website
- http://www.co.gaines.tx.us, https://www.co.gaines.tx.us/