Johnson County, Kansas: Realigning Affluent Suburb county. In 2024, voted D+8%. Republican peak: R+50 in 1972.
Key facts
- 2024 presidential margin
- D+8MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 620,6312024 5-year
- Median household income
- $109,2082024 5-year
- White (non-Hispanic)
- 78.5%2024 5-year
- Black
- 4.9%2024 5-year
- Hispanic / Latino
- 9.3%2024 5-year
- Peak Democratic margin
- D+23 in 1912MIT Election Lab
- Peak Republican margin
- R+50 in 1972MIT Election Lab
- Most similar
- James City County, VA · similarity 0.98
2024 results by precinct
2024 precinct map of Johnson CountyPrecinct-level 2024 presidential results for Johnson 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 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −47.1% |
| 1896 | +3.1% |
| 1900 | −4.8% |
| 1904 | −28.5% |
| 1908 | −4.9% |
| 1912 | +22.8% |
| 1916 | +2.0% |
| 1920 | −30.0% |
| 1924 | −38.8% |
| 1928 | −41.4% |
| 1932 | −0.0% |
| 1936 | −15.7% |
| 1940 | −28.2% |
| 1944 | −34.8% |
| 1948 | −22.3% |
| 1952 | −45.1% |
| 1956 | −42.9% |
| 1960 | −32.5% |
| 1964 | −9.3% |
| 1968 | −33.0% |
| 1972 | −50.5% |
| 1976 | −35.2% |
| 1980 | −36.2% |
| 1984 | −45.4% |
| 1988 | −26.5% |
| 1992 | −13.3% |
| 1996 | −22.1% |
| 2000 | −23.4% |
| 2004 | −23.3% |
| 2008 | −9.0% |
| 2012 | −17.4% |
| 2016 | −2.6% |
| 2020 | +8.2% |
| 2024 | +8.4% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 183,451 | 154,247 | 346,860 | ||
| D | 184,259 | 155,631 | 347,214 | ||
| R | 129,852 | 137,490 | 294,208 | ||
| R | 110,526 | 158,401 | 275,074 | ||
| R | 127,091 | 152,627 | 283,432 | ||
| R | 97,866 | 158,103 | 258,687 | ||
| R | 79,118 | 129,965 | 217,536 | ||
| R | 68,129 | 110,368 | 190,894 | ||
| R | 59,573 | 85,418 | 194,866 | ||
| R | 55,183 | 95,591 | 152,199 | ||
| R | 38,019 | 101,987 | 140,882 | ||
| R | 33,210 | 78,048 | 123,983 | ||
| R | 35,605 | 75,798 | 114,142 | ||
| R | 24,324 | 76,161 | 102,727 | ||
| R | 26,034 | 55,060 | 87,912 | ||
| R | 31,213 | 37,672 | 69,179 | ||
| R | 21,914 | 43,026 | 65,033 | ||
| R | 14,185 | 35,511 | 49,733 | ||
| R | 10,990 | 29,103 | 40,163 | ||
| R | 8,982 | 14,191 | 23,378 | ||
| R | 5,771 | 11,951 | 17,773 | ||
| R | 5,770 | 10,326 | 16,142 | ||
| R | 6,108 | 8,399 | 14,554 | ||
| R | 6,485 | 6,487 | 13,096 | ||
| R | 3,373 | 8,185 | 11,627 | ||
| R | 2,519 | 6,102 | 9,224 | ||
| R | 2,303 | 4,325 | 6,729 | ||
| D | 3,928 | 3,767 | 7,900 | ||
| D | 1,837 | 834 | 4,390 | ||
| R | 2,091 | 2,313 | 4,520 | ||
| R | 1,373 | 2,573 | 4,213 | ||
| R | 2,171 | 2,393 | 4,639 | ||
| D | 2,462 | 2,313 | 4,837 | ||
| O | 0 | 1,932 | 4,101 | ||
| — | — | — | — | ||
| — | — | — | — | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
23.7%
English
15.4%
Irish
14.0%
American
4.4%
Italian
3.2%
Scottish
2.2%
French
2.1%
African American
3.9%
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: 38.6 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
$109,208
Johnson County ranks in the top 5% of US counties.
Johnson County$109,208
Kansas$74,275
United States$80,734
Johnson 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
5.4%
Child poverty is below the national average.
Children under 185.2%
Working age (18–64)5.3%
Seniors (65+)7.5%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
87.9%
speak English only
Spanish5.3%
Asian & Pacific Islander2.8%
Other Indo-European2.7%
Other languages1.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 53.4% of residents not counted as adherents by any reporting body.
Johnson County anchors the Kansas City suburban corridor and has trended blue across three consecutive presidential cycles, making it a bellwether for college-educated suburban realignment in a traditionally Republican state.
Once reliably Republican — a margin of fifty points in 1972 at its widest — Johnson County has trended Democratic. The 2024 margin was eight points.
A median household income of $109,208 — among the higher at this geographic scale — and a population of 620,631 describe the county. The county's voting pattern over the last decade is most similar to that of James City County and Kent 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.
Johnson County, Kansas. Akashic. https://akashic.app/county/20091/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More realigning affluent suburb counties
Frequently asked questions
How did Johnson County, Kansas vote in 2024?
In 2024, Johnson County, Kansas voted Democratic by 8.4 points (D+8), carried by the Democratic candidate. Out of 346,860 votes cast, 183,451 went Democratic and 154,247 went Republican.
What is Johnson County, Kansas's political typology?
Akashic places Johnson County, Kansas 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 5 times, Republican 28 times, and other 1 times.
When did Johnson County, Kansas last vote Republican?
The most recent presidential election in which Johnson County, Kansas voted Republican was 2016.
How many people live in Johnson County, Kansas?
Johnson County, Kansas has a population of 620,631 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Johnson County, Kansas?
Median household income in Johnson County, Kansas is $109,208 — above the national median of $80,734. The Kansas state median is $74,275.
What is the political history of Johnson County, Kansas?
Akashic tracks 38 presidential elections in Johnson County, Kansas from 1876 to 2024. Of those, 5 went Democratic and 28 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.