Kane County, Illinois: New American county. In 2024, voted D+9%. Republican peak: R+69 in 1920.
Key facts
- 2024 presidential margin
- D+9MIT Election Lab
- Political typology
- New AmericanAkashic typology
- Population
- 517,2552024 5-year
- Median household income
- $103,1632024 5-year
- White (non-Hispanic)
- 58.0%2024 5-year
- Black
- 5.0%2024 5-year
- Hispanic / Latino
- 33.4%2024 5-year
- Peak Democratic margin
- D+14 in 2020MIT Election Lab
- Peak Republican margin
- R+69 in 1920MIT Election Lab
- Most similar
- Charleston County, SC · similarity 0.99
2024 results by precinct
2024 precinct map of Kane CountyPrecinct-level 2024 presidential results for Kane County, with each precinct boundary colored by Democratic-vs-Republican margin.
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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 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −14.8% |
| 1896 | −42.0% |
| 1900 | −38.0% |
| 1904 | −58.9% |
| 1908 | −46.7% |
| 1912 | +10.4% |
| 1916 | −39.7% |
| 1920 | −69.5% |
| 1924 | −68.1% |
| 1928 | −40.3% |
| 1932 | −14.1% |
| 1936 | −8.3% |
| 1940 | −24.0% |
| 1944 | −24.6% |
| 1948 | −29.7% |
| 1952 | −35.7% |
| 1956 | −45.7% |
| 1960 | −27.8% |
| 1964 | −6.5% |
| 1968 | −31.5% |
| 1972 | −40.1% |
| 1976 | −26.4% |
| 1980 | −33.8% |
| 1984 | −38.8% |
| 1988 | −28.9% |
| 1992 | −8.7% |
| 1996 | −5.6% |
| 2000 | −11.9% |
| 2004 | −10.9% |
| 2008 | +11.8% |
| 2012 | +1.1% |
| 2016 | +10.5% |
| 2020 | +14.4% |
| 2024 | +9.3% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 120,077 | 99,260 | 223,534 | ||
| D | 130,166 | 96,775 | 231,876 | ||
| D | 103,665 | 82,734 | 199,687 | ||
| D | 90,332 | 88,335 | 181,725 | ||
| D | 106,756 | 83,963 | 193,299 | ||
| R | 73,813 | 92,065 | 167,297 | ||
| R | 60,127 | 76,996 | 141,405 | ||
| R | 47,902 | 54,375 | 114,693 | ||
| R | 44,568 | 55,684 | 127,938 | ||
| R | 36,366 | 66,283 | 103,412 | ||
| R | 31,875 | 72,655 | 105,159 | ||
| R | 29,015 | 64,106 | 103,784 | ||
| R | 34,057 | 59,275 | 95,374 | ||
| R | 27,525 | 64,546 | 92,377 | ||
| R | 26,609 | 54,144 | 87,420 | ||
| R | 40,703 | 46,391 | 87,094 | ||
| R | 31,279 | 55,389 | 86,761 | ||
| R | 20,848 | 56,009 | 76,916 | ||
| R | 24,058 | 50,801 | 74,955 | ||
| R | 21,176 | 39,284 | 60,992 | ||
| R | 23,362 | 38,689 | 62,236 | ||
| R | 25,676 | 41,949 | 67,914 | ||
| R | 28,187 | 33,491 | 63,729 | ||
| R | 24,638 | 32,934 | 58,656 | ||
| R | 16,184 | 38,236 | 54,673 | ||
| R | 3,517 | 32,717 | 42,858 | ||
| R | 4,323 | 26,832 | 32,398 | ||
| R | 9,875 | 23,868 | 35,204 | ||
| O | 4,394 | 2,415 | 19,066 | ||
| R | 4,316 | 12,840 | 18,267 | ||
| R | 2,799 | 12,638 | 16,708 | ||
| R | 5,259 | 12,031 | 17,811 | ||
| R | 4,852 | 12,133 | 17,347 | ||
| R | 5,778 | 7,977 | 14,827 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
18.2%
Irish
10.7%
Italian
7.6%
Polish
7.0%
English
6.6%
American
2.7%
French
1.7%
African American
4.0%
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: 38.8 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
$103,163
Kane County ranks in the top 5% of US counties.
Kane County$103,163
Illinois$83,390
United States$80,734
Kane 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
7.9%
Child poverty is below the national average.
Children under 1811.1%
Working age (18–64)6.8%
Seniors (65+)8.5%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
68.2%
speak English only
Spanish26.1%
Other Indo-European3.4%
Asian & Pacific Islander1.8%
Other languages0.5%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 43.5% of residents not counted as adherents by any reporting body.
Kane County, anchored by Aurora and Elgin, has shifted steadily leftward over the past decade as its population diversified — the 2024 presidential margin of D+9.3 reflects a collar-county realignment that continues to reshape Illinois statewide math.
Kane County has leaned Democratic in recent presidential elections, reaching a Democratic margin of fourteen points in 2020. Between 2020 and 2024 it moved five points toward the Republican candidate — part of the sharpest rightward shift recorded among any group of places in the country.
Its demographics describe the shift: a 58% non-Hispanic-white share, a median household income of $103,163, and a population of 517,255. The county's voting pattern over the last decade is most similar to that of Charleston County and DuPage 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.
Kane County, Illinois. Akashic. https://akashic.app/county/17089/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Kane County, Illinois vote in 2024?
In 2024, Kane County, Illinois voted Democratic by 9.3 points (D+9), carried by the Democratic candidate. Out of 223,534 votes cast, 120,077 went Democratic and 99,260 went Republican.
What is Kane County, Illinois's political typology?
Akashic places Kane County, Illinois in the "New American" typology — Communities where a large share of households speak a language other than English — multilingual, Democratic-leaning overall, yet the hardest-swinging bloc toward the Republican Party in 2024. 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 5 times, Republican 28 times, and other 1 times.
When did Kane County, Illinois last vote Republican?
The most recent presidential election in which Kane County, Illinois voted Republican was 2004.
How many people live in Kane County, Illinois?
Kane County, Illinois has a population of 517,255 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Kane County, Illinois?
Median household income in Kane County, Illinois is $103,163 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Kane County, Illinois?
Akashic tracks 38 presidential elections in Kane County, Illinois from 1876 to 2024. Of those, 5 went Democratic and 28 went Republican. The county's typology — "New American" — captures where that record, its demographics, and its recent swing place it among American communities.