McMullen County, Texas

McMullen County
The McMullen County Courthouse in Tilden
Location within the U.S. state of Texas
Texas's location within the U.S.
Coordinates: 28°21′N 98°34′W / 28.35°N 98.57°W / 28.35; -98.57
Country United States
State Texas
Founded1877
Named afterJohn McMullen
SeatTilden
Largest communityTilden
Area
  Total
1,157 sq mi (3,000 km2)
  Land1,140 sq mi (3,000 km2)
  Water17 sq mi (40 km2)  1.5%
Population
 (2020)
  Total
600
  Estimate 
(2022)
576
  Density0.5/sq mi (0.2/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district28th
Websitemcmullencounty.org

McMullen County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 600, making it the fourth-least populous county in Texas. Its county seat is Tilden. The county was established from parts of Bexar County, Atascosa County, and Live Oak County in 1858 and later organized in 1877. It is named for John McMullen, founder of a colony in Texas. The McMullen County Courthouse was designed by the architect W.C. Stephenson, originally from Buffalo, New York. Stephenson also designed some 50 buildings in Beeville, including the Bee County Courthouse.