County · Colorado
Adams County, Colorado
Adams County, Colorado. Adams County had 554,668 residents in 2025 by the Census Bureau's estimate, up 6.8% since 2020, faster than Colorado (+4.1%). It holds 20 places (10 cities, villages and boroughs and 10 census-designated) and 107 census tracts. GEOID 08001.
Adams County is one of the 10 counties of the Denver-Aurora-Centennial, CO metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
554,668
Census Bureau estimate (no margin published)
2020 Census count: 519,572 · ACS 2020-2024: 530,225
Median household income
$94,571
±$1,524 (90% margin)
Colorado: $95,470
Median home value
$484,200
±$3,903 (90% margin)
Colorado: $539,400
Median gross rent
$1,781
±$21 (90% margin)
Colorado: $1,761
How many people live in Adams County, and is it growing?
The 2020 Census counted 519,572 residents in Adams County. The Census Bureau estimates 554,668 for July 1, 2025, up 6.8% since 2020, faster than Colorado (+4.1%). The 2020-2024 American Community Survey puts the population at 530,225 over 1,167 square miles of land.
| Measure | Adams County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Total population | 530,225 | 5,862,189 | +26,117 |
| Households | 188,730±791 | 2,374,218 | +22,280 |
| Average household size | 2.79±0.01 | 2.42 | −0.21 |
| Housing units | 195,793±113 | 2,589,053 | +22,593 |
Adams County's population since 2000
From 363,857 in 2000 to 554,668 in 2025: up 52.4%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Adams County?
Adams County holds 20 places: 10 cities, villages and boroughs (incorporated places) and 10 census-designated places. The largest is Thornton with 147,766 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Thornton | 141,867 | $103,088 |
|---|---|---|
| Westminster | 116,317 | $100,272 |
| Commerce City | 62,418 | $111,972 |
| Aurora | 386,261 | $88,368 |
| Brighton | 40,083 | $107,679 |
| Northglenn | 38,131 | $84,030 |
| Sherrelwood | 19,228 | $75,327 |
| Welby | 15,553 | $80,026 |
| Federal Heights | 14,382 | $56,597 |
| Berkley | 12,536 | $84,637 |
| Derby | 8,407 | $82,138 |
| Twin Lakes (Adams County) | 8,226 | $95,583 |
| Shaw Heights | 5,185 | $86,250 |
| Todd Creek | 5,028 | $194,362 |
| Arvada | 124,402 | $117,348 |
| Bennett | 2,862 | $107,736 |
| Strasburg | 3,307 | $117,845 |
| North WashingtonGEOID 0854750 | 733 | not published |
| WatkinsGEOID 0882900 | 682 | $158,173 |
| Lochbuie | 8,088 | $97,009 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Adams County?
The median resident of Adams County is 34.8 years old; 24.9% are under 18 and 11.3% are 65 or older. The largest group is non-Hispanic white residents at 45.2%, then Hispanic or Latino residents (of any race) at 42.8%. 15.6% of residents were born outside the United States.
| Measure | Adams County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median age | 34.8±0.1 | 37.7 | +1.0 |
| Under 18 years | 24.9% | 21.0% | – |
| 65 years and over | 11.3%±0.1 pts | 15.6% | – |
| Hispanic or Latino (any race) | 42.8% | 22.5% | +2.8 pts |
| White alone, not Hispanic | 45.2%±0.2 pts | 64.8% | −4.8 pts |
| Black or African American alone, not Hispanic | 3.3%±0.2 pts | 3.8% | no clear change |
| Asian alone, not Hispanic | 3.8%±0.2 pts | 3.2% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.3%±0.1 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.2%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 3.7%±0.3 pts | 4.6% | – |
| Some other race alone, not Hispanic | 0.7%±0.2 pts | 0.5% | – |
| Born outside the United States | 15.6%±0.6 pts | 9.8% | no clear change |
| Speak a language other than English at home (age 5+) | 29.3%±0.7 pts | 16.2% | – |
| Civilian veterans (age 18+) | 6.1%±0.3 pts | 7.5% | – |
| With a disability | 11.3%±0.4 pts | 11.4% | – |
| No health insurance coverage | 11.6%±0.6 pts | 7.7% | +1.5 pts |
| High school graduate or higher (age 25+) | 85.2%±0.6 pts | 92.9% | – |
| Bachelor's degree or higher (age 25+) | 29.0%±0.8 pts | 45.7% | +4.7 pts |
| Graduate or professional degree (age 25+) | 9.2%±0.4 pts | 17.6% | – |
| Moved from another state in the past year | 2.3%±0.3 pts | 3.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Adams County earn?
Half of Adams County's 188,730 households earn less than $94,571 a year (±$1,524), against $95,470 in Colorado. In 2015-2019 the median was $87,628 in 2024 dollars, so it rose by $6,943 after inflation. 9.8% of residents live below the poverty line.
| Measure | Adams County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $94,571±$1,524 | $95,470 | +$6,943 |
| Mean household income | $116,985±$2,082 | $128,255 | – |
| Per capita income | $42,206±$661 | $52,636 | +$4,900 |
| People below the poverty line | 9.8%±0.6 pts | 9.4% | −1.0 pts |
| Children under 18 below the poverty line | 13.6%±1.4 pts | 11.1% | no clear change |
| Households receiving SNAP | 10.3%±0.6 pts | 8.5% | – |
| Households with a broadband subscription | 92.9%±0.6 pts | 93.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Adams County?
Owners occupy 68.6% of Adams County's occupied homes and renters 31.4%. The median owner-occupied home is valued at $484,200 by its owner (±$3,903). The median renter pays $1,781 a month including utilities, and 45.8% of renters pay 35% or more of their income on rent.
| Measure | Adams County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $484,200±$3,903 | $539,400 | +$105,639 |
| Median gross rent | $1,781±$21 | $1,761 | +$124 |
| Renters paying 35% or more of income on rent | 45.8%±2.1 pts | 42.7% | no clear change |
| Median monthly owner costs, with a mortgage | $2,378±$25 | $2,326 | – |
| Owner-occupied homes | 68.6%±0.8 pts | 66.2% | +2.4 pts |
| Housing units | 195,793±113 | 2,589,053 | +22,593 |
| Homeowner vacancy rate | 0.6%±0.2 pts | 0.8% | – |
| Rental vacancy rate | 3.5%±0.7 pts | 5.1% | – |
| Single-family detached homes | 62.2%±0.9 pts | 61.4% | – |
| Mobile homes | 5.4%±0.4 pts | 3.5% | – |
| Built 2020 or later | 3.6%±0.3 pts | 3.0% | – |
| Built 1939 or earlier | 1.7%±0.2 pts | 7.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Adams County building?
Builders took permits for 2,608 new housing units across Adams County in 2025 (1,884 single-family), 4.7 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Adams County get to work?
70.2% of Adams County's workers drive alone and 15.2% work from home. The average trip to work takes 29.8 minutes. The unemployment rate in 2020-2024 averaged 4.6%.
| Measure | Adams County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 72.2%±0.6 pts | 68.6% | – |
| Unemployment rate | 4.6%±0.4 pts | 4.6% | +0.6 pts |
| Drove alone to work | 70.2%±1.0 pts | 65.1% | – |
| Carpooled | 10.2%±0.7 pts | 7.7% | – |
| Public transportation | 1.8%±0.2 pts | 1.6% | – |
| Walked | 1.2%±0.2 pts | 2.5% | – |
| Worked from home | 15.2%±0.7 pts | 21.0% | +9.8 pts |
| Mean travel time to work | 29.8 min±0.6 | 25.2 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Adams County's census tracts?
Adams County is divided into 107 census tracts. Among those with a reliable estimate, median household income runs from $45,475 (Tract 87.06) to $225,000 (Tract 85.60).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Adams County compare with Colorado's other counties?
| Measure | Rank |
|---|---|
| Population | 5th of 64 |
| Growth 2020-2025 | 10th of 64 |
| Residents per square mile | 6th of 64 |
| Median household income | 17th of 64 |
| Median home value | 23rd of 64 |
| Median gross rent | 14th of 63 |
| Poverty rate | 36th of 63 |
| Bachelor's degree or higher | 39th of 64 |
| Median age | 63rd of 64 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Adams County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.