Johnson County, Indiana: Realigning Affluent Suburb county. In 2024, voted R+34%. Republican peak: R+55 in 1972.
Key facts
- 2024 presidential margin
- R+34MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 166,3152024 5-year
- Median household income
- $90,4542024 5-year
- White (non-Hispanic)
- 84.6%2024 5-year
- Black
- 3.3%2024 5-year
- Hispanic / Latino
- 4.3%2024 5-year
- Peak Democratic margin
- D+36 in 1912MIT Election Lab
- Peak Republican margin
- R+55 in 1972MIT Election Lab
- Most similar
- Hancock County, IN · similarity 1.00
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 | +10.1% |
| 1896 | +14.6% |
| 1900 | +12.8% |
| 1904 | +5.3% |
| 1908 | +12.5% |
| 1912 | +35.8% |
| 1916 | +11.9% |
| 1920 | +5.5% |
| 1924 | −2.6% |
| 1928 | −9.5% |
| 1932 | +20.0% |
| 1936 | +13.1% |
| 1940 | −0.8% |
| 1944 | −6.6% |
| 1948 | +0.5% |
| 1952 | −21.3% |
| 1956 | −24.6% |
| 1960 | −25.2% |
| 1964 | −1.8% |
| 1968 | −29.1% |
| 1972 | −54.9% |
| 1976 | −23.7% |
| 1980 | −38.4% |
| 1984 | −50.3% |
| 1988 | −46.3% |
| 1992 | −31.1% |
| 1996 | −31.7% |
| 2000 | −41.3% |
| 2004 | −48.1% |
| 2008 | −25.5% |
| 2012 | −38.3% |
| 2016 | −41.9% |
| 2020 | −34.7% |
| 2024 | −34.2% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 24,880 | 51,588 | 78,059 | ||
| R | 24,376 | 51,219 | 77,258 | ||
| R | 17,318 | 45,456 | 67,147 | ||
| R | 17,260 | 39,513 | 58,092 | ||
| R | 21,553 | 36,487 | 58,644 | ||
| R | 13,109 | 37,765 | 51,255 | ||
| R | 11,952 | 29,404 | 42,284 | ||
| R | 11,278 | 23,733 | 39,259 | ||
| R | 8,712 | 20,353 | 37,438 | ||
| R | 9,001 | 24,654 | 33,778 | ||
| R | 7,715 | 23,482 | 31,368 | ||
| R | 8,445 | 20,018 | 30,174 | ||
| R | 10,075 | 16,414 | 26,749 | ||
| R | 5,067 | 17,537 | 22,724 | ||
| R | 5,946 | 12,089 | 21,111 | ||
| R | 10,099 | 10,472 | 20,663 | ||
| R | 7,400 | 12,426 | 19,919 | ||
| R | 6,125 | 10,125 | 16,291 | ||
| R | 5,909 | 9,119 | 15,082 | ||
| D | 6,216 | 6,151 | 12,454 | ||
| R | 5,426 | 6,194 | 11,673 | ||
| R | 6,350 | 6,451 | 12,857 | ||
| D | 6,934 | 5,315 | 12,329 | ||
| D | 6,940 | 4,593 | 11,718 | ||
| R | 4,548 | 5,513 | 10,152 | ||
| R | 4,699 | 4,954 | 9,757 | ||
| D | 5,452 | 4,863 | 10,722 | ||
| D | 3,108 | 2,428 | 5,737 | ||
| D | 2,890 | 924 | 5,495 | ||
| D | 3,268 | 2,519 | 5,992 | ||
| D | 2,882 | 2,574 | 5,792 | ||
| D | 3,088 | 2,367 | 5,643 | ||
| D | 3,083 | 2,288 | 5,458 | ||
| D | 2,606 | 2,093 | 5,099 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
17.7%
English
12.4%
American
12.1%
Irish
10.1%
Italian
2.6%
Scottish
2.2%
French
1.4%
African American
2.6%
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: 38.0 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
$90,454
Johnson County ranks in the top 10% of US counties.
Johnson County$90,454
Indiana$71,957
United States$80,734
Johnson County ranks in the top 10% 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
7.4%
Child poverty is below the national average.
Children under 187.8%
Working age (18–64)7.2%
Seniors (65+)9.1%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
91.7%
speak English only
Spanish3.1%
Other Indo-European3.1%
Asian & Pacific Islander1.7%
Other languages0.4%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 64.8% of residents not counted as adherents by any reporting body.
Johnson County has added tens of thousands of residents over two decades of suburban sprawl south of Indianapolis, yet its presidential margins have remained among the widest in the state, hitting R+34.3 in 2024.
Once reliably Republican — a margin of fifty-five points in 1972 at its widest — Johnson County has trended Democratic. Between 2020 and 2024 the county moved one point toward the Democratic candidate; the 2024 margin was thirty-four points.
A median household income of $90,454 — among the higher at this geographic scale — and a population of 166,315 describe the county. The county's voting pattern over the last decade is most similar to that of Hancock County and Rockingham 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, Indiana. Akashic. https://akashic.app/county/18081/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Johnson County, Indiana vote in 2024?
In 2024, Johnson County, Indiana voted Republican by 34.2 points (R+34), carried by the Republican candidate. Out of 78,059 votes cast, 24,880 went Democratic and 51,588 went Republican.
What is Johnson County, Indiana's political typology?
Akashic places Johnson County, Indiana 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 11 times, Republican 23 times, and other 0 times.
When did Johnson County, Indiana last vote Democratic?
The most recent presidential election in which Johnson County, Indiana voted Democratic was 1948.
How many people live in Johnson County, Indiana?
Johnson County, Indiana has a population of 166,315 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Johnson County, Indiana?
Median household income in Johnson County, Indiana is $90,454 — above the national median of $80,734. The Indiana state median is $71,957.
What is the political history of Johnson County, Indiana?
Akashic tracks 38 presidential elections in Johnson County, Indiana from 1876 to 2024. Of those, 11 went Democratic and 23 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.