Washington County, Colorado Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 53rd-largest in Colorado
The population of Washington County, Colorado is 4,839 as of the 2023 American Community Survey, making it the 53rd-largest county in Colorado. The median household income is $65,164, the median home value is $218,300, and the median age is 41.2.
The population of Washington County has declined 0.8% since 2010 (4,808 → 4,771), a -0.06% annualized rate.
4,839
Population
-0.06%
Annual growth
2
People / sq mi
$65,164
Median Income
$218,300
Median Home Value
Washington County covers 2,518 sq mi of land at 1.9 people per square mile.
About Washington County, CO
Washington County stands apart on settlement density — it is among the most sparsely settled of US counties, at roughly 2 people per square mile. Washington County is a county in Colorado with a population of 4,839.
The typical household here earns about $65,164, below the US median of $78,538. Only 4.9% of residents live in poverty, below the national 12.4%. Homes carry a median value of $218,300, with typical rent around $991.
Roughly 24.9% of adults have a bachelor’s, below the national 35.0%. Remote work is on the higher side at 12.4%, below the national 14.0%, and the average commute runs about 21 minutes each way.
Washington County Population History (2010-2024)
The county of Washington County had a population of 4,808 in 2010 and 4,771 in 2024, a -0.8% growth over 14 years. The peak was 4,909 in 2017. Average annual growth rate: -0.05%.
4,771
Population (2024)
4,808
Population (2010)
4,909
Peak (2017)
-0.05%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 4,808 |
| 2011 | 4,750 |
| 2012 | 4,689 |
| 2013 | 4,731 |
| 2014 | 4,720 |
| 2015 | 4,775 |
| 2016 | 4,824 |
| 2017 | 4,909 |
| 2018 | 4,861 |
| 2019 | 4,869 |
| 2020 | 4,814 |
| 2021 | 4,869 |
| 2022 | 4,840 |
| 2023 | 4,859 |
| 2024 | 4,771 |
Race & Ethnicity
| White | 88.6% |
| Black or African American | 1.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.8% |
| Two or More Races | 0.0% |
Age & Sex
41.2
Median Age
47.6%
Female
52.4%
Male
21.8%
Age 65+
Age Distribution
Children (under 15): 18.3% · Seniors (65+): 21.8%
Income & Poverty
| Median household income | $65,164$-27,306 vs state |
| Mean household income | $82,841 |
| Per-capita income | $36,138 |
| Poverty rate | 4.9%-1.0% vs state |
| Unemployment rate | 2.0% |
| Employment-to-population | 57.1% |
Top Industries by Employment
The largest employment sector in Washington County is professional & business services, accounting for 24.2% of workers.
How residents commute
0.1%
Drive alone
5.5%
Carpool
71.5%
Public transit
12.4%
Work from home
21.2 min
Avg commute
Housing
$218,300$-283,900 vs state
Median home value
$991
Median rent
71.7%
Homeownership rate
2,280
Total housing units
90.8%
Occupied
9.2%
Vacant
28.3%
Renter-occupied
Social & access
93.7%
With health insurance
92.7%
With broadband internet
27.2%
Foreign-born
6.9%
Veterans (18+)
12.5%
With a disability
93.2%
Speak language other than English at home
Education
89.7%
High School+
24.9%
Bachelor's+
Largest cities in Colorado
Other counties in Colorado
Part of Colorado
Metro areas in Colorado
County rankings
Frequently Asked Questions
Washington County, Colorado has a population of 4,839 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 53rd-largest county in Colorado. Population density is 2 people per square mile.
The population of Washington County has declined 0.8% since 2010 (4,808 → 4,771), a -0.06% annualized rate.
The median household income in Washington County, Colorado is $65,164, with mean (average) household income of $82,841 and per-capita income of $36,138. 4.9% of residents live below the federal poverty level.
In Washington County, the largest racial and ethnic groups are White (88.6%), Hispanic or Latino (1.8%), Black or African American (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Washington County, Colorado is 41.2 years. Residents are 47.6% female and 52.4% male.
The median home value in Washington County is $218,300 and median monthly rent is $991. 71.7% of occupied housing units are owner-occupied. The county has 2,280 total housing units, 9.2% of which are vacant.
The largest employment sector in Washington County, Colorado is professional, scientific, and management services, employing 24.2% of workers. The unemployment rate is 2.0%.
Denver is among the largest cities associated with Washington County, Colorado, with a population of 713,734.
Washington County, CO Climate
Washington County, CO has an average annual temperature of 9.5°C (49°F) and receives about 390 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.5°C
Avg Temp
390
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 27° | 8 mm |
| February | -1° / 31° | 6 mm |
| March | 4° / 38° | 25 mm |
| April | 8° / 46° | 31 mm |
| May | 14° / 57° | 73 mm |
| June | 19° / 67° | 64 mm |
| July | 23° / 73° | 68 mm |
| August | 22° / 71° | 47 mm |
| September | 17° / 63° | 29 mm |
| October | 10° / 50° | 19 mm |
| November | 3° / 37° | 13 mm |
| December | -2° / 28° | 7 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 Washington County, CO
The most comfortable months to visit Washington 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 Washington County
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Top-rated places to stay near Washington 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.