Moore County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 21,358. The county seat is Dumas. The county was created in 1876 and organized in 1892. It is named for Edwin Ward Moore, the commander of the Texas Navy. The Dumas micropolitan statistical area includes all of Moore County.

Potter County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 118,525. Its county seat is Amarillo. The county was created in 1876 and organized in 1887. It is named for Robert Potter, a politician, signer of the Texas Declaration of Independence, and the Texas Secretary of the Navy. Potter County is included in the Amarillo metropolitan area.