Pecos County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 15,193. The county seat is Fort Stockton. The county was created in 1871 and organized in 1875. It is named for the Pecos River. It is one of the nine counties that comprise the Trans-Pecos region of West Texas.

Fort Stockton is a city in and the county seat of Pecos County, Texas, United States. It is located on Interstate 10, future Interstate 14, U.S. Highways 67, 285, and 385, and the Santa Fe Railroad, 329 mi (529 km) northwest of San Antonio and 240 mi (390 km) southeast of El Paso. Its population was 8,466 at the 2020 census.