Brown County is a county in west-central Texas. As of the 2020 census, the population was 38,095. Its county seat is Brownwood. The county was founded in 1856 and organized in 1858. It is named for Henry Stevenson Brown, a commander at the Battle of Velasco, an early conflict between Texians and Mexicans.

Lampasas County is a county located on the Edwards Plateau in the U.S. state of Texas. As of the 2020 census, its population was 21,627. Its county seat is Lampasas. The county is named for the Lampasas River.