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
Summit County is a county in Colorado with a population of 30,857. It ranks #19 among counties in Colorado by population. The median age is 39.2, in line with the national median. The population is 54.8% male and 45.2% female.
The median household income in Summit County is $106,255, above the US median of $74,580. 3.4% of residents live below the federal poverty level. Home values sit at a median of $850,700, with monthly rent averaging $1,851. The homeownership rate of 69.2% is higher than the national rate of 64.8%.
Educational attainment in Summit County reflects 52.5% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 21.4% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 21.2 minutes each way.
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.
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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.