Jefferson County, Kansas: Farm Belt county. In 2024, voted R+37%. Republican peak: R+51 in 1924.
Key facts
- 2024 presidential margin
- R+37MIT Election Lab
- Political typology
- Farm BeltAkashic typology
- Population
- 18,3492024 5-year
- Median household income
- $81,2782024 5-year
- White (non-Hispanic)
- 92.5%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 3.5%2024 5-year
- Peak Democratic margin
- D+10 in 1912MIT Election Lab
- Peak Republican margin
- R+51 in 1924MIT Election Lab
- Most similar
- Wright County, MO · similarity 1.00
2024 results by precinct
2024 precinct map of Jefferson CountyPrecinct-level 2024 presidential results for Jefferson 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 | −48.6% |
| 1896 | −1.0% |
| 1900 | −10.6% |
| 1904 | −34.8% |
| 1908 | −13.5% |
| 1912 | +9.8% |
| 1916 | −4.1% |
| 1920 | −38.3% |
| 1924 | −51.0% |
| 1928 | −49.9% |
| 1932 | +3.4% |
| 1936 | −8.9% |
| 1940 | −32.2% |
| 1944 | −37.8% |
| 1948 | −19.3% |
| 1952 | −47.4% |
| 1956 | −40.9% |
| 1960 | −31.6% |
| 1964 | −7.0% |
| 1968 | −29.0% |
| 1972 | −48.3% |
| 1976 | −12.9% |
| 1980 | −36.2% |
| 1984 | −38.6% |
| 1988 | −12.2% |
| 1992 | −0.4% |
| 1996 | −13.4% |
| 2000 | −18.1% |
| 2004 | −24.5% |
| 2008 | −18.7% |
| 2012 | −23.1% |
| 2016 | −31.9% |
| 2020 | −32.1% |
| 2024 | −36.7% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 3,030 | 6,694 | 9,975 | ||
| R | 3,194 | 6,334 | 9,782 | ||
| R | 2,518 | 5,213 | 8,440 | ||
| R | 2,977 | 4,827 | 8,013 | ||
| R | 3,542 | 5,220 | 8,950 | ||
| R | 3,253 | 5,408 | 8,793 | ||
| R | 3,000 | 4,423 | 7,877 | ||
| R | 2,757 | 3,781 | 7,668 | ||
| R | 2,538 | 2,569 | 7,780 | ||
| R | 2,810 | 3,605 | 6,492 | ||
| R | 1,990 | 4,524 | 6,563 | ||
| R | 1,776 | 4,046 | 6,263 | ||
| R | 2,470 | 3,225 | 5,851 | ||
| R | 1,237 | 3,679 | 5,061 | ||
| R | 1,355 | 2,781 | 4,915 | ||
| R | 2,066 | 2,380 | 4,485 | ||
| R | 1,739 | 3,353 | 5,101 | ||
| R | 1,536 | 3,677 | 5,235 | ||
| R | 1,411 | 3,980 | 5,417 | ||
| R | 2,010 | 2,986 | 5,058 | ||
| R | 1,575 | 3,504 | 5,098 | ||
| R | 2,212 | 4,330 | 6,580 | ||
| R | 3,105 | 3,711 | 6,841 | ||
| D | 3,185 | 2,974 | 6,271 | ||
| R | 1,601 | 4,810 | 6,433 | ||
| R | 1,320 | 4,422 | 6,082 | ||
| R | 1,535 | 3,463 | 5,029 | ||
| R | 2,919 | 3,174 | 6,286 | ||
| D | 1,537 | 1,155 | 3,882 | ||
| R | 1,720 | 2,270 | 4,085 | ||
| R | 1,199 | 2,568 | 3,935 | ||
| R | 1,912 | 2,374 | 4,343 | ||
| R | 2,276 | 2,322 | 4,645 | ||
| O | 0 | 1,973 | 4,056 | ||
| — | — | — | — | ||
| — | — | — | — | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
29.3%
English
14.3%
Irish
13.6%
American
7.2%
Scottish
2.5%
Italian
2.3%
Polish
1.7%
Sample size too small to break out by ancestry reliably.
Multiple ancestry combinations reported; no single grouping above 1%.
Sample size too small to break out by ancestry reliably.
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: 44.2 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
$81,278
Jefferson County ranks in the top 25% of US counties.
Jefferson County$81,278
Kansas$74,275
United States$80,734
Jefferson County ranks in the top 25% 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
5.6%
Child poverty is below the national average.
Children under 183.5%
Working age (18–64)5.9%
Seniors (65+)9.9%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
98.0%
speak English only
Spanish1.0%
Other Indo-European0.9%
Asian & Pacific Islander0.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 63.4% of residents not counted as adherents by any reporting body.
Jefferson County sits in the northeastern corner of Kansas, where a predominantly rural, white population has produced consistent double-digit Republican presidential margins since at least 2000, reaching R+36.9 in 2024.
The Republican margin here reached fifty-one points in 1924. Between 2020 and 2024 the county moved five points toward the Republican candidate; the 2024 margin was thirty-seven points.
A population of 18,349, a 93% non-Hispanic-white share, and a median household income of $81,278 describe an agricultural county. The county's voting pattern over the last decade is most similar to that of Wright County and Cowley 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.
Jefferson County, Kansas. Akashic. https://akashic.app/county/20087/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More farm belt counties
Frequently asked questions
How did Jefferson County, Kansas vote in 2024?
In 2024, Jefferson County, Kansas voted Republican by 36.7 points (R+37), carried by the Republican candidate. Out of 9,975 votes cast, 3,030 went Democratic and 6,694 went Republican.
What is Jefferson County, Kansas's political typology?
Akashic places Jefferson County, Kansas in the "Farm Belt" typology — Rural Plains and Midwest farm counties — Republican, with modest recent movement. 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 2 times, Republican 31 times, and other 1 times.
When did Jefferson County, Kansas last vote Democratic?
The most recent presidential election in which Jefferson County, Kansas voted Democratic was 1932.
How many people live in Jefferson County, Kansas?
Jefferson County, Kansas has a population of 18,349 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Kansas?
Median household income in Jefferson County, Kansas is $81,278 — above the national median of $80,734. The Kansas state median is $74,275.
What is the political history of Jefferson County, Kansas?
Akashic tracks 38 presidential elections in Jefferson County, Kansas from 1876 to 2024. Of those, 2 went Democratic and 31 went Republican. The county's typology — "Farm Belt" — captures where that record, its demographics, and its recent swing place it among American communities.