Adams County, Colorado

Adams County: County in Colorado, United States

About

Adams County is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 441,603 and a population density of 142 people per km². After 10 years in 2020 county had an estimated population of 519,883 inhabitants. Its county seat is Brighton. The county was created 123 years ago in 1901.

Adams County locator map
Location of Adams County on Colorado map.

Quick Facts about Adams County

Population : 519,883 (2020)
Country : United States of America
State : Colorado (United States)
Different from : Adams County, Adams County, Adams County, Adams County, Adams County, Adams County, Adams County, Adams County, Adams County, Adams County, Adams County
Twitter username : adamscountygov
Area : 3102 km2
Water as percent of area : 1.4%
Land as percent of area : 98.6%
Named for : Alva Adams
Altitude : 5,223 feet / 1592 meters
Capital : Brighton
Establishment : April 04, 1901
Time Zone : America/Denver
Local time : 01:32:35 (22nd February 2025)
Density : 168 Pop. per km² as of 2020
Population growth : 15.06% (2010-2020)
Adams County Government Center image
Adams County Government Center
Adams County Government Center image
Adams County Government Center image

Geography

Adams County is located at 39°52'25"N 104°20'16"W (39.8736300, -104.3379100). It has 7 neighbors: Arapahoe County, Broomfield County, Denver County, Jefferson County, Washington County, Morgan County and Weld County.

Adams County map

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The largest city of Adams County is Aurora with a population of 387,377. Other cities include, Thornton population 148,113, Westminster population 115,046, Commerce City population 60,336 and Brighton population 40,783. See all Adams County cities & populated places.

Adams County Populated Places

Cities, towns, neighborhoods & other populated places in Adams County.

City Name Population Title
Aurora 387,377 The third most populous city in Colorado and the center of the Denver metropolitan area.
Thornton 148,113 The seventh most populous city in Colorado.
Westminster 115,046 The most populous city in Adams County, Colorado.
Commerce City 60,336 The most populous city in Adams County, Colorado.
Brighton 40,783 A city in Adams County, Colorado.
Northglenn 38,845 City in Colorado
Sherrelwood 18,287 Census-designated place in Adams County, Colorado
Welby 14,846 Census-designated place in Colorado
Lone Tree 13,614 City in Douglas County, Colorado, United States of America
Federal Heights 13,598 City in Adams County, Colorado, United States
Berkley 11,207 Census designated place
Twin Lakes 6,101 City in Freeborn County, Minnesota, United States of America
Todd Creek 3,768 Census-designated place in Adams County, Colorado
Bennett 3,017 Town in Colorado

Adams County has 7 neighbours.

  • Brighton

Demographics

The population of Adams County increased by 15.06% in 10 years.

Year Population % Change Method
2010 441,603 - census
2011 452,201 2.34% estimation process
2012 460,558 1.81% estimation process
2013 469,978 2% estimation process
2014 479,946 2.08% estimation process
2015 490,443 2.14% estimation process
2016 497,734 1.46% estimation process
2017 503,590 1.16% estimation process
2018 511,354 1.52% estimation process
2019 517,421 1.17% estimation process
2020 519,883 0.47% estimation process

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People born in Adams County (2)

People born in Adams County, including politician Kevin Priola, US painter & illumintor Fritz Wilhelm Pfeiffer, .

List

Other places with the same name (12)

Colorado Other Counties (more counties)

County Name Population Title
Denver 735,538 The twentieth most populous city in the United States and the center of the Denver metropolitan area.
Denver County 735,538 County in Colorado, United States, coterminous with the City of Denver
El Paso County 728,310 One of the 64 counties in the U.
Arapahoe County 657,452 County in Colorado, United States
Jefferson County 583,283 County in Colorado, United States
Colorado Springs 482,131 The second most populous city in Colorado and the center of the Colorado Springs metropolitan area.
Aurora 387,377 The third most populous city in Colorado and the center of the Denver metropolitan area.
Douglas County 360,750 County in Colorado, United States
Larimer County 360,428 County in Colorado, United States
Weld County 333,983 County in Colorado, United States
Boulder County 327,171 County in Colorado, United States
Pueblo County 169,823 County in Colorado, United States
Fort Collins 168,234 The fifth most populous city in Colorado.
Lakewood 157,429 The fifth most populous city in Colorado.
Mesa County 155,603 County in Colorado, United States
Thornton 148,113 The seventh most populous city in Colorado.