Adams County, Colorado

Adams County
Adams County
County
	Adams County Government Center in Brighton
	Flag
	Location within the U.S. state of Colorado
	Colorado's location within the U.S.
	Coordinates: 39°52′N 104°21′W / 39.87°N 104.35°W
Country	United States
State	Colorado
Founded	April 15, 1901
Named for	Alva Adams
Seat	Brighton
Largest city	Thornton
Area
• Total	1,184 sq mi (3,070 km2)
• Land	1,168 sq mi (3,030 km2)
• Water	16 sq mi (40 km2) 1.4%
Population (2020)
• Total	519,572
• Density	440/sq mi (170/km2)
Time zone	UTC−7 (Mountain)
• Summer (DST)	UTC−6 (MDT)
Congressional districts	4th, 6th, 7th, 8th
Website	www.adcogov.org
	Fifth most populous Colorado county

Adams County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 519,572.^[2] The county seat is Brighton, and the largest city is Thornton.^[3] The county is named for Alva Adams, an early Governor of the State of Colorado in 1887–1889.^[1] Adams County is part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area.

^ ^a ^b Gannett, Henry (1905). The Origin of Certain Place Names in the United States. U.S. Government Printing Office. pp. 23.
^ "U.S. Census Bureau QuickFacts". U.S. Census Bureau. Retrieved September 4, 2021.
^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.