Dallas County, Texas

Dallas County
County
From top, left to right: Dallas panorama, Dallas Hall in University Park, former Dallas County Courthouse with the Texas flag in 2017, Las Colinas in Irving
Flag
Location within the U.S. state of Texas
Texas's location within the U.S.
Coordinates: 32°46′N 96°47′W / 32.77°N 96.78°W / 32.77; -96.78
Country	United States
State	Texas
Founded	March 30, 1846
Named for	George M. Dallas
Seat	Dallas
Largest city	Dallas
Area
• Total	908.54 sq mi (2,353.1 km2)
• Land	873.06 sq mi (2,261.2 km2)
• Water	35.48 sq mi (91.9 km2)
Population  (2020)
• Total	2,613,539
• Estimate  (2023)	2,606,358
• Density	2,900/sq mi (1,100/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional districts	5th, 6th, 24th, 30th, 32nd, 33rd
Website	www.dallascounty.org

Dallas County is the second-most populous county in the U.S. state of Texas with a 2020 U.S. census count of 2,613,539,^[1] making it the ninth-most populous county in the country. Dallas County is included in the Dallas-Arlington-Fort Worth metropolitan statistical area—colloquially referred to as the Dallas–Fort Worth metroplex. Municipal expansion within Dallas County has blurred the geographic lines between cities and between neighboring counties.^[2]

Its county seat is the city of Dallas,^[3] which is also Texas' third-largest city and the ninth-largest city in the United States. The county was founded in 1846 and was possibly named for George Mifflin Dallas, the 11th Vice President of the United States under U.S. President James K. Polk.