Adams County, Colorado Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 5th-largest in Colorado
The population of Adams County, Colorado is 524,408 as of the 2023 American Community Survey, making it the 5th-largest county in Colorado. The median household income is $91,387, the median home value is $458,400, and the median age is 34.6.
The population of Adams County has grown 22.4% since 2010 (443,692 → 542,973), a +1.45% annualized rate.
524,408
Population
+1.45%
Annual growth
449
People / sq mi
$91,387
Median Income
$458,400
Median Home Value
Adams County covers 1,167 sq mi of land at 449.4 people per square mile.
About Adams County, CO
In Adams County, home values do the distinguishing — a median of $458,400. With 524,408 residents, Adams County is a county in Colorado. That makes it one of the ten largest counties in Colorado in the country, at #5 by population.
Earnings sit at the high end: a median household income of $91,387, above the US median of $78,538. Only 7.0% of residents live in poverty, below the national 12.4%. Real estate commands a premium here — a median home value of $458,400, with typical rent around $1,713.
About 28.0% of adults 25 and older have a bachelor’s degree, below the 35.0% national figure. A solid 13.4% of workers are based at home, close to the national 14.0%, and the average commute runs about 30 minutes each way.
High housing values reframe the income picture in Adams County — even solid earnings stretch less against home prices and rents at this level.
Adams County Population History (2010-2024)
The county of Adams County had a population of 443,692 in 2010 and 542,973 in 2024, a 22.4% growth over 14 years. The peak was 542,973 in 2024. Average annual growth rate: 1.45%.
542,973
Population (2024)
443,692
Population (2010)
542,973
Peak (2024)
1.45%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 443,692 |
| 2011 | 452,209 |
| 2012 | 460,568 |
| 2013 | 469,995 |
| 2014 | 479,954 |
| 2015 | 490,448 |
| 2016 | 497,735 |
| 2017 | 503,717 |
| 2018 | 511,485 |
| 2019 | 516,575 |
| 2020 | 520,517 |
| 2021 | 523,603 |
| 2022 | 528,356 |
| 2023 | 535,677 |
| 2024 | 542,973 |
Race & Ethnicity
| White | 60.2% |
| Black or African American | 3.5% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 4.4% |
| Two or More Races | 0.0% |
Age & Sex
34.6
Median Age
49.2%
Female
50.8%
Male
11.0%
Age 65+
Age Distribution
Children (under 15): 20.9% · Seniors (65+): 11.0%
Income & Poverty
| Median household income | $91,387$-1,083 vs state |
| Mean household income | $112,415 |
| Per-capita income | $40,167 |
| Poverty rate | 7.0%+1.1% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 68.5% |
Top Industries by Employment
The largest employment sector in Adams County is professional & business services, accounting for 17.6% of workers.
How residents commute
2.1%
Drive alone
1.1%
Carpool
71.4%
Public transit
13.4%
Work from home
29.7 min
Avg commute
Housing
$458,400$-43,800 vs state
Median home value
$1,713
Median rent
68.9%
Homeownership rate
191,765
Total housing units
96.5%
Occupied
3.5%
Vacant
31.1%
Renter-occupied
Social & access
88.9%
With health insurance
96.5%
With broadband internet
31.7%
Foreign-born
6.2%
Veterans (18+)
11.3%
With a disability
70.7%
Speak language other than English at home
Education
85.0%
High School+
28.0%
Bachelor's+
Largest cities in Colorado
Other counties in Colorado
Part of Colorado
Metro areas in Colorado
County rankings
Common questions about Adams County, CO
Frequently Asked Questions
Adams County, Colorado has a population of 524,408 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 5th-largest county in Colorado. Population density is 449 people per square mile.
The population of Adams County has grown 22.4% since 2010 (443,692 → 542,973), a +1.45% annualized rate.
The median household income in Adams County, Colorado is $91,387, with mean (average) household income of $112,415 and per-capita income of $40,167. 7.0% of residents live below the federal poverty level.
In Adams County, the largest racial and ethnic groups are White (60.2%), Hispanic or Latino (4.4%), Black or African American (3.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Adams County, Colorado is 34.6 years. Residents are 49.2% female and 50.8% male.
The median home value in Adams County is $458,400 and median monthly rent is $1,713. 68.9% of occupied housing units are owner-occupied. The county has 191,765 total housing units, 3.5% of which are vacant.
The largest employment sector in Adams County, Colorado is professional, scientific, and management services, employing 17.6% of workers. The unemployment rate is 3.3%.
Denver is among the largest cities associated with Adams County, Colorado, with a population of 713,734.
Adams County, CO Climate
Adams County, CO has an average annual temperature of 9.7°C (49°F) and receives about 378 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.7°C
Avg Temp
378
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 28° | 10 mm |
| February | 0° / 32° | 8 mm |
| March | 4° / 39° | 26 mm |
| April | 8° / 47° | 36 mm |
| May | 14° / 57° | 66 mm |
| June | 19° / 67° | 53 mm |
| July | 23° / 73° | 53 mm |
| August | 22° / 71° | 44 mm |
| September | 17° / 63° | 34 mm |
| October | 10° / 51° | 21 mm |
| November | 3° / 37° | 17 mm |
| December | -2° / 29° | 10 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Adams County, CO
The most comfortable months to visit Adams County, CO are typically August, June and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -10°C low). May is usually the wettest month.
Where to stay near Adams County
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Population, race, income, age, and trends across Colorado
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.