County · Colorado
Summit County, Colorado
Summit County, Colorado. Summit County had 31,517 residents in 2025 by the Census Bureau's estimate, up 0.7% since 2020, slower than Colorado (+4.1%). It holds 9 places (6 cities, villages and boroughs and 3 census-designated) and 12 census tracts. GEOID 08117.
Summit County is one of the 2 counties of the Breckenridge, CO micropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
31,517
Census Bureau estimate (no margin published)
2020 Census count: 31,055 · ACS 2020-2024: 31,017
Median household income
$109,773
±$11,445 (90% margin)
Colorado: $95,470
Median home value
$939,900
±$84,672 (90% margin)
Colorado: $539,400
Median gross rent
$1,928
±$114 (90% margin)
Colorado: $1,761
How many people live in Summit County, and is it growing?
The 2020 Census counted 31,055 residents in Summit County. The Census Bureau estimates 31,517 for July 1, 2025, up 0.7% since 2020, slower than Colorado (+4.1%). The 2020-2024 American Community Survey puts the population at 31,017 over 608 square miles of land.
| Measure | Summit County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Total population | 31,017 | 5,862,189 | +368 |
| Households | 12,545±638 | 2,374,218 | +1,904 |
| Average household size | 2.42±0.12 | 2.42 | −0.42 |
| Housing units | 32,251±25 | 2,589,053 | +1,031 |
Summit County's population since 2000
From 23,548 in 2000 to 31,517 in 2025: up 33.8%. 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 Summit County?
Summit County holds 9 places: 6 cities, villages and boroughs (incorporated places) and 3 census-designated places. The largest is Breckenridge with 5,015 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Breckenridge | 5,078 | $138,191 |
|---|---|---|
| Silverthorne | 4,402 | $125,478 |
| Frisco | 2,913 | $113,506 |
| Keystone | 1,369 | $51,591 |
| Dillon | 1,064 | $111,250 |
| Blue RiverGEOID 0807410 | 877 | $134,250 |
| Copper MountainGEOID 0817150 | 650 | not published |
| MontezumaGEOID 0851690 | 74 | $130,357 |
| HeeneyGEOID 0835400 | 74 | not published |
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 Summit County?
The median resident of Summit County is 39.5 years old; 16.3% are under 18 and 15.7% are 65 or older. The largest group is non-Hispanic white residents at 74.5%, then Hispanic or Latino residents (of any race) at 17.2%. 8.5% of residents were born outside the United States.
| Measure | Summit County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median age | 39.5±1.0 | 37.7 | no clear change |
| Under 18 years | 16.3%±0.3 pts | 21.0% | – |
| 65 years and over | 15.7%±0.5 pts | 15.6% | – |
| Hispanic or Latino (any race) | 17.2% | 22.5% | +2.9 pts |
| White alone, not Hispanic | 74.5%±1.1 pts | 64.8% | −7.6 pts |
| Black or African American alone, not Hispanic | 0.4%±0.4 pts | 3.8% | – |
| Asian alone, not Hispanic | 1.5%±0.7 pts | 3.2% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.3%±0.3 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.4%±0.5 pts | 0.1% | – |
| Two or more races, not Hispanic | 5.7%±1.2 pts | 4.6% | – |
| Some other race alone, not Hispanic | 0.1%±0.2 pts | 0.5% | – |
| Born outside the United States | 8.5%±1.7 pts | 9.8% | −2.9 pts |
| Speak a language other than English at home (age 5+) | 9.8%±2.1 pts | 16.2% | – |
| Civilian veterans (age 18+) | 6.0%±1.3 pts | 7.5% | – |
| With a disability | 6.3%±1.3 pts | 11.4% | – |
| No health insurance coverage | 10.2%±2.1 pts | 7.7% | −6.4 pts |
| High school graduate or higher (age 25+) | 95.9%±1.6 pts | 92.9% | – |
| Bachelor's degree or higher (age 25+) | 55.0%±3.4 pts | 45.7% | no clear change |
| Graduate or professional degree (age 25+) | 21.1%±3.0 pts | 17.6% | – |
| Moved from another state in the past year | 3.2%±1.2 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 Summit County earn?
Half of Summit County's 12,545 households earn less than $109,773 a year (±$11,445), against $95,470 in Colorado. In 2015-2019 it was $97,566 in 2024 dollars; the margins of error cannot tell the two periods apart. 7.7% of residents live below the poverty line.
| Measure | Summit County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $109,773±$11,445 | $95,470 | no clear change |
| Mean household income | $147,734±$11,886 | $128,255 | – |
| Per capita income | $63,743±$4,721 | $52,636 | +$12,939 |
| People below the poverty line | 7.7%±2.2 pts | 9.4% | no clear change |
| Children under 18 below the poverty line | 10.8%±8.2 pts | 11.1% | – |
| Households receiving SNAP | 1.7%±0.9 pts | 8.5% | – |
| Households with a broadband subscription | 97.8%±1.1 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 Summit County?
Owners occupy 72.1% of Summit County's occupied homes and renters 27.9%. The median owner-occupied home is valued at $939,900 by its owner (±$84,672). The median renter pays $1,928 a month including utilities, and 44.2% of renters pay 35% or more of their income on rent.
| Measure | Summit County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $939,900±$84,672 | $539,400 | +$226,590 |
| Median gross rent | $1,928±$114 | $1,761 | +$214 |
| Renters paying 35% or more of income on rent | 44.2%±8.4 pts | 42.7% | no clear change |
| Median monthly owner costs, with a mortgage | $2,564±$191 | $2,326 | – |
| Owner-occupied homes | 72.1%±3.4 pts | 66.2% | +6.6 pts |
| Housing units | 32,251±25 | 2,589,053 | +1,031 |
| Homeowner vacancy rate | 1.5%±1.0 pts | 0.8% | – |
| Rental vacancy rate | 41.9%±5.3 pts | 5.1% | – |
| Single-family detached homes | 34.6%±1.8 pts | 61.4% | – |
| Mobile homes | 1.3%±0.4 pts | 3.5% | – |
| Built 2020 or later | 1.5%±0.5 pts | 3.0% | – |
| Built 1939 or earlier | 1.4%±0.5 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 Summit County building?
Builders took permits for 318 new housing units across Summit County in 2025 (135 single-family), 10.1 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 Summit County get to work?
55.2% of Summit County's workers drive alone and 23.7% work from home. The average trip to work takes 20.8 minutes. The unemployment rate in 2020-2024 averaged 5.0%.
| Measure | Summit County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 75.8%±2.3 pts | 68.6% | – |
| Unemployment rate | 5.0%±1.9 pts | 4.6% | no clear change |
| Drove alone to work | 55.2%±4.0 pts | 65.1% | – |
| Carpooled | 9.5%±2.5 pts | 7.7% | – |
| Public transportation | 4.0%±2.0 pts | 1.6% | – |
| Walked | 6.0%±1.8 pts | 2.5% | – |
| Worked from home | 23.7%±3.6 pts | 21.0% | +13.4 pts |
| Mean travel time to work | 20.8 min±1.9 | 25.2 min | +4.2 min |
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 Summit County's census tracts?
Summit County is divided into 12 census tracts. Among those with a reliable estimate, median household income runs from $58,929 (Tract 1.01) to $163,194 (Tract 4.03).
| Tract 1.0108117000101 | 1,261±424 | $58,929 |
|---|---|---|
| Tract 1.0208117000102 | 5,647±355 | $125,135 |
| Tract 1.0308117000103 | 1,638±522 | $140,750 |
| Tract 2.0108117000201 | 1,513±372 | $52,396 |
| Tract 2.0208117000202 | 2,605±657 | $67,326 |
| Tract 2.0308117000203 | 4,597±694 | $134,281 |
| Tract 3.0108117000301 | 1,938±318 | $103,750 |
| Tract 3.0208117000302 | 2,054±559 | $135,512 |
| Tract 4.0308117000403 | 1,826±457 | $163,194 |
| Tract 4.0408117000404 | 1,850±403 | $110,646 |
| Tract 4.0508117000405 | 3,984±839 | $158,125 |
| Tract 4.0608117000406 | 2,104±553 | $103,915 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Summit County compare with Colorado's other counties?
| Measure | Rank |
|---|---|
| Population | 19th of 64 |
| Growth 2020-2025 | 38th of 64 |
| Residents per square mile | 12th of 64 |
| Median household income | 5th of 64 |
| Median home value | 2nd of 64 |
| Median gross rent | 7th of 63 |
| Poverty rate | 53rd of 63 |
| Bachelor's degree or higher | 10th of 64 |
| Median age | 46th 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 Summit 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.