Dallam County, Texas

Dallam County, Texas
1922 Dallam County Courthouse in Dalhart
Location within the U.S. state of Texas
Coordinates: 36°17′N 102°35′W / 36.29°N 102.59°W / 36.29; -102.59
Country United States
State Texas
Founded1891
SeatDalhart
Largest cityDalhart
Area
 • Total
1,505 sq mi (3,900 km2)
 • Land1,503 sq mi (3,890 km2)
 • Water2.0 sq mi (5.2 km2)  0.1%
Population
 (2020)
 • Total
7,115
 • Density4.7/sq mi (1.8/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district13th
Websitewww.dallam.org

Dallam County is the north-westernmost county in the U.S. state of Texas. As of the 2020 Census, its population was 7,115. Its county seat is Dalhart. The county was founded in 1876 and later organized in 1891. It is named for James Wilmer Dallam, a lawyer and newspaper publisher.