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 architect W.C. Stephenson, originally from Buffalo, New York. Stephenson also designed some 50 buildings in Beeville, including the Bee County Courthouse.
Geography
According to the United States Census Bureau, the county has a total area of , of which (1.5%) are covered by water.
Major highways
- 20px State Highway 16
- 20px State Highway 72
- 20px State Highway 97
- 20px Farm to Market Road 99
- 20px Farm to Market Road 624
- 20px Farm to Market Road 791
- 20px Farm to Market Road 1582
Adjacent counties
- Atascosa County (north)
- Live Oak County (east)
- Duval County (south)
- La Salle County (west)
- Frio County (northwest)