Summit County, Colorado Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 19th-largest in Colorado
The population of Summit County, Colorado is 30,857 as of the 2023 American Community Survey, making it the 19th-largest county in Colorado. The median household income is $106,255, the median home value is $850,700, and the median age is 39.2.
The population of Summit County has grown 10.0% since 2010 (28,075 → 30,882), a +0.68% annualized rate.
30,857
Population
+0.68%
Annual growth
51
People / sq mi
$106,255
Median Income
$850,700
Median Home Value
Summit County covers 608 sq mi of land at 50.7 people per square mile.
About Summit County, CO
Housing cost is the defining feature of Summit County: the median home is valued at $850,700. Summit County is a county in Colorado with a population of 30,857. It ranks #19 among counties in Colorado by population.
Households here are among the highest-earning of all US counties: median income is $106,255, above the US median of $78,538. Poverty is among the lowest of comparable US counties, at 3.4% — below the national 12.4%. Home prices are steep, with the typical property valued at $850,700, with typical rent around $1,851.
Degree attainment is near the top of the range for US counties: 52.5% of adults 25+ hold a bachelor’s, above the 35.0% national rate. Remote work is widespread — 21.4% of workers stay home, above the national 14.0%, and the average commute runs about 21 minutes each way.
High housing values reframe the income picture in Summit County — even solid earnings stretch less against home prices and rents at this level.
Summit County Population History (2010-2024)
The county of Summit County had a population of 28,075 in 2010 and 30,882 in 2024, a 10.0% growth over 14 years. The peak was 31,239 in 2020. Average annual growth rate: 0.69%.
30,882
Population (2024)
28,075
Population (2010)
31,239
Peak (2020)
0.69%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 28,075 |
| 2011 | 28,048 |
| 2012 | 28,307 |
| 2013 | 28,741 |
| 2014 | 29,333 |
| 2015 | 30,064 |
| 2016 | 30,573 |
| 2017 | 30,848 |
| 2018 | 30,771 |
| 2019 | 30,851 |
| 2020 | 31,239 |
| 2021 | 31,235 |
| 2022 | 30,905 |
| 2023 | 30,824 |
| 2024 | 30,882 |
Race & Ethnicity
| White | 79.5% |
| Black or African American | 0.4% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.7% |
| Two or More Races | 0.0% |
Age & Sex
39.2
Median Age
45.2%
Female
54.8%
Male
15.3%
Age 65+
Age Distribution
Children (under 15): 13.6% · Seniors (65+): 15.3%
Income & Poverty
| Median household income | $106,255+$13,785 vs state |
| Mean household income | $138,554 |
| Per-capita income | $58,219 |
| Poverty rate | 3.4%-2.5% vs state |
| Unemployment rate | 2.5% |
| Employment-to-population | 72.4% |
Top Industries by Employment
The largest employment sector in Summit County is education & health care, accounting for 20.6% of workers.
How residents commute
4.5%
Drive alone
3.3%
Carpool
59.8%
Public transit
21.4%
Work from home
21.2 min
Avg commute
Housing
$850,700+$348,500 vs state
Median home value
$1,851
Median rent
69.2%
Homeownership rate
31,849
Total housing units
38.8%
Occupied
61.2%
Vacant
30.8%
Renter-occupied
Social & access
89.8%
With health insurance
98.8%
With broadband internet
61.5%
Foreign-born
5.7%
Veterans (18+)
6.4%
With a disability
90.0%
Speak language other than English at home
Education
94.9%
High School+
52.5%
Bachelor's+
Largest cities in Colorado
Other counties in Colorado
Part of Colorado
Metro areas in Colorado
County rankings
Frequently Asked Questions
Summit County, Colorado has a population of 30,857 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 19th-largest county in Colorado. Population density is 51 people per square mile.
The population of Summit County has grown 10.0% since 2010 (28,075 → 30,882), a +0.68% annualized rate.
The median household income in Summit County, Colorado is $106,255, with mean (average) household income of $138,554 and per-capita income of $58,219. 3.4% of residents live below the federal poverty level.
In Summit County, the largest racial and ethnic groups are White (79.5%), Hispanic or Latino (0.7%), Black or African American (0.4%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Summit County, Colorado is 39.2 years. Residents are 45.2% female and 54.8% male.
The median home value in Summit County is $850,700 and median monthly rent is $1,851. 69.2% of occupied housing units are owner-occupied. The county has 31,849 total housing units, 61.2% of which are vacant.
The largest employment sector in Summit County, Colorado is education, health care, and social assistance, employing 20.6% of workers. The unemployment rate is 2.5%.
Denver is among the largest cities associated with Summit County, Colorado, with a population of 713,734.
More from Colorado
Population 736,008
Population 713,734
Population 655,709
Population 579,715
Full rankings of Colorado counties
Statewide data for Colorado
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.