Summit County, Colorado: Realigning Affluent Suburb county. In 2024, voted D+37%. Democratic peak: D+95 in 1896.
Key facts
- 2024 presidential margin
- D+37MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 31,0172024 5-year
- Median household income
- $109,7732024 5-year
- White (non-Hispanic)
- 76.5%2024 5-year
- Black
- 0.4%2024 5-year
- Hispanic / Latino
- 17.2%2024 5-year
- Peak Democratic margin
- D+95 in 1896MIT Election Lab
- Peak Republican margin
- R+34 in 1984MIT Election Lab
- Most similar
- Douglas County, KS · similarity 0.99
2024 results by precinct
2024 precinct map of Summit CountyPrecinct-level 2024 presidential results for Summit County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | +1.5% |
| 1884 | −4.5% |
| 1888 | −11.4% |
| 1892 | −25.6% |
| 1896 | +95.4% |
| 1900 | +41.6% |
| 1904 | +0.7% |
| 1908 | +33.0% |
| 1912 | +43.6% |
| 1916 | +44.0% |
| 1920 | −3.6% |
| 1924 | −15.2% |
| 1928 | −8.2% |
| 1932 | +26.9% |
| 1936 | +29.6% |
| 1940 | +6.0% |
| 1944 | −15.7% |
| 1948 | +12.7% |
| 1952 | −23.9% |
| 1956 | −29.2% |
| 1960 | −2.9% |
| 1964 | +16.8% |
| 1968 | −25.2% |
| 1972 | −20.5% |
| 1976 | −23.5% |
| 1980 | −17.0% |
| 1984 | −33.9% |
| 1988 | −5.3% |
| 1992 | +13.0% |
| 1996 | +8.4% |
| 2000 | +7.3% |
| 2004 | +20.2% |
| 2008 | +33.0% |
| 2012 | +24.7% |
| 2016 | +27.6% |
| 2020 | +39.5% |
| 2024 | +37.2% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 11,762 | 5,244 | 17,545 | ||
| D | 12,620 | 5,319 | 18,465 | ||
| D | 9,557 | 5,100 | 16,174 | ||
| D | 9,347 | 5,571 | 15,312 | ||
| D | 9,802 | 4,883 | 14,899 | ||
| D | 8,144 | 5,370 | 13,735 | ||
| D | 5,304 | 4,497 | 11,068 | ||
| D | 3,970 | 3,261 | 8,419 | ||
| D | 3,344 | 2,256 | 8,370 | ||
| R | 2,595 | 2,893 | 5,624 | ||
| R | 1,588 | 3,253 | 4,918 | ||
| R | 1,285 | 2,027 | 4,355 | ||
| R | 1,087 | 1,826 | 3,140 | ||
| R | 707 | 1,082 | 1,833 | ||
| R | 301 | 536 | 934 | ||
| D | 483 | 344 | 828 | ||
| R | 400 | 424 | 827 | ||
| R | 235 | 429 | 664 | ||
| R | 271 | 442 | 714 | ||
| D | 378 | 292 | 675 | ||
| R | 237 | 326 | 566 | ||
| D | 540 | 479 | 1,024 | ||
| D | 496 | 268 | 769 | ||
| D | 397 | 224 | 644 | ||
| R | 306 | 362 | 681 | ||
| R | 241 | 354 | 745 | ||
| R | 388 | 418 | 830 | ||
| D | 717 | 268 | 1,020 | ||
| D | 600 | 179 | 965 | ||
| D | 743 | 366 | 1,144 | ||
| D | 569 | 561 | 1,165 | ||
| D | 967 | 394 | 1,378 | ||
| D | 1,243 | 28 | 1,273 | ||
| O | 0 | 279 | 1,090 | ||
| R | 557 | 701 | 1,260 | ||
| R | 556 | 609 | 1,173 | ||
| D | 1,328 | 1,289 | 2,641 | ||
| — | — | — | — |
Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
14.5%
English
10.9%
Irish
7.7%
American
2.8%
Italian
2.7%
Polish
2.2%
Scottish
2.2%
Sample size too small to break out by ancestry reliably.
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 39.5 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$109,773
Summit County ranks in the top 5% of US counties.
Summit County$109,773
Colorado$95,470
United States$80,734
Summit County ranks in the top 5% of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
7.7%
Child poverty is below the national average.
Children under 1810.8%
Working age (18–64)6.7%
Seniors (65+)13.6%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
90.2%
speak English only
Spanish8.4%
Other Indo-European1.1%
Asian & Pacific Islander0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 68.7% of residents not counted as adherents by any reporting body.
Summit County's economy revolves around ski resorts and outdoor tourism, drawing a highly educated, transient workforce that has pushed its presidential margins well above the state's already-blue average — 37 points Democratic in 2024.
Once reliably Republican — a margin of thirty-four points in 1984 at its widest — Summit County has trended Democratic. Between 2020 and 2024 the county moved two points toward the Republican candidate; the 2024 margin was thirty-seven points.
A median household income of $109,773 — among the higher at this geographic scale — and a population of 31,017 describe the county. The county's voting pattern over the last decade is most similar to that of Douglas County and Hood River County.
Most similar counties
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Summit County, Colorado. Akashic. https://akashic.app/county/08117/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Summit County, Colorado vote in 2024?
In 2024, Summit County, Colorado voted Democratic by 37.2 points (D+37), carried by the Democratic candidate. Out of 17,545 votes cast, 11,762 went Democratic and 5,244 went Republican.
What is Summit County, Colorado's political typology?
Akashic places Summit County, Colorado in the "Realigning Affluent Suburb" typology — College-educated, affluent suburbs — the one bloc moving toward the Democratic Party. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 21 times, Republican 15 times, and other 1 times.
When did Summit County, Colorado last vote Republican?
The most recent presidential election in which Summit County, Colorado voted Republican was 1988.
How many people live in Summit County, Colorado?
Summit County, Colorado has a population of 31,017 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Summit County, Colorado?
Median household income in Summit County, Colorado is $109,773 — above the national median of $80,734. The Colorado state median is $95,470.
What is the political history of Summit County, Colorado?
Akashic tracks 38 presidential elections in Summit County, Colorado from 1876 to 2024. Of those, 21 went Democratic and 15 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.