Jefferson County, Missouri
AkashicJefferson County, MOTrumpR+36.7
2024 precinct map of Jefferson CountyPrecinct-level 2024 presidential results for Jefferson County, with each precinct boundary colored by Democratic-vs-Republican margin, and gold where an independent or third-party candidate carried the precinct.
How it voted
Share of the 2024 vote
| Donald Trump ✓Republican | 67.7% | 80,796 |
|---|---|---|
| Kamala HarrisDemocratic | 31.0% | 36,965 |
| Chase OliverLibertarian | 0.8% | 947 |
Harris +50Trump +50
51 precincts · 119,314 votes. Hover any precinct for its result.
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
38 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| R | 31.0%Harris36,965 | 67.7%Trump80,796 | 0.8%Oliver947 | 119,314 | ||
| R | 32.3%Biden37,856 | 65.7%Trump77,046 | 1.4%Jorgensen1,635 | 117,286 | ||
| R | 29.5%Clinton31,568 | 64.5%Trump69,036 | 3.7%Johnson3,968 | 106,995 | ||
| R | 42.4%Obama41,564 | 55.1%Romney53,978 | 1.7%Gray1,715 | 98,024 | ||
| D | 50.6%Obama53,467 | 48.1%McCain50,804 | 1.4%Nader1,433 | 105,704 | ||
| R | 49.4%Kerry46,057 | 50.0%Bush46,624 | 0.6%Badnarik583 | 93,264 | ||
| D | 50.0%Gore38,616 | 47.6%Bush36,766 | 1.5%Nader1,182 | 77,204 | ||
| D | 48.5%Clinton32,073 | 36.1%Dole23,877 | 13.5%Perot8,893 | 66,102 | ||
| D | 44.3%Clinton32,569 | 28.1%Bush20,637 | 27.3%Perot20,057 | 73,501 | ||
| R | 48.5%Dukakis27,738 | 51.2%Bush29,279 | 0.4%Fulani215 | 57,232 | ||
| R | 36.7%Mondale20,026 | 63.3%Reagan34,525 | 0.0% | 54,551 | ||
| R | 43.8%Carter24,042 | 52.0%Reagan28,546 | 4.2%Anderson2,294 | 54,882 | ||
| D | 57.3%Carter25,159 | 41.6%Ford18,261 | 1.1%McCarthy495 | 43,915 | ||
| R | 38.6%McGovern13,787 | 61.4%Nixon21,947 | 0.0% | 35,734 | ||
| D | 42.6%Humphrey13,230 | 37.7%Nixon11,708 | 19.7%Wallace6,115 | 31,053 | ||
| D | 70.6%Johnson18,916 | 29.4%Goldwater7,887 | 0.0% | 26,803 | ||
| D | 56.9%Kennedy17,054 | 43.1%Nixon12,910 | 0.0% | 29,964 | ||
| D | 56.4%Stevenson13,868 | 43.6%Eisenhower10,712 | 0.0% | 24,580 | ||
| D | 57.1%Stevenson12,808 | 42.8%Eisenhower9,607 | 0.1%Hallinan22 | 22,437 | ||
| D | 62.5%Truman10,280 | 37.0%Dewey6,085 | 0.4%Thurmond70 | 16,435 | ||
| D | 53.9%Roosevelt7,953 | 45.8%Dewey6,758 | 0.2%Thomas34 | 14,745 | ||
| D | 55.8%Roosevelt9,553 | 43.9%Willkie7,517 | 0.3%Thomas45 | 17,115 | ||
| D | 61.2%Roosevelt9,158 | 37.2%Landon5,575 | 1.6%Lemke241 | 14,974 | ||
| D | 63.3%Roosevelt8,130 | 35.5%Hoover4,559 | 1.2%Thomas155 | 12,844 | ||
| R | 45.3%Smith5,231 | 54.5%Hoover6,285 | 0.2%Thomas22 | 11,538 | ||
| R | 43.7%Davis4,356 | 48.9%Coolidge4,870 | 7.4%La Follette737 | 9,963 | ||
| R | 44.2%Cox4,684 | 54.1%Harding5,730 | 1.7%Debs181 | 10,595 | ||
| R | 46.6%Wilson3,021 | 51.0%Hughes3,310 | 2.4%Benson158 | 6,489 | ||
| D | 45.5%Wilson2,368 | 40.8%Taft2,127 | 13.7%Roosevelt713 | 5,208 | ||
| R | 46.0%Bryan2,698 | 52.0%Taft3,050 | 2.0%Debs117 | 5,865 | ||
| R | 45.8%Parker2,560 | 52.1%Roosevelt2,909 | 2.1%Debs116 | 5,585 | ||
| D | 49.6%Bryan2,798 | 49.2%McKinley2,775 | 1.2%Woolley67 | 5,640 | ||
| R | 48.9%Bryan2,785 | 50.5%McKinley2,876 | 0.7%Palmer38 | 5,699 | ||
| D | 53.0%Cleveland2,617 | 44.7%Harrison2,207 | 2.3%Weaver113 | 4,937 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +8.3% |
| 1896 | −1.6% |
| 1900 | +0.4% |
| 1904 | −6.2% |
| 1908 | −6.0% |
| 1912 | +4.6% |
| 1916 | −4.5% |
| 1920 | −9.9% |
| 1924 | −5.2% |
| 1928 | −9.1% |
| 1932 | +27.8% |
| 1936 | +23.9% |
| 1940 | +11.9% |
| 1944 | +8.1% |
| 1948 | +25.5% |
| 1952 | +14.3% |
| 1956 | +12.8% |
| 1960 | +13.8% |
| 1964 | +41.1% |
| 1968 | +4.9% |
| 1972 | −22.8% |
| 1976 | +15.7% |
| 1980 | −8.2% |
| 1984 | −26.6% |
| 1988 | −2.7% |
| 1992 | +16.2% |
| 1996 | +12.4% |
| 2000 | +2.4% |
| 2004 | −0.6% |
| 2008 | +2.5% |
| 2012 | −12.7% |
| 2016 | −35.0% |
| 2020 | −33.4% |
| 2024 | −36.7% |
DemocraticRepublican
voter registration
Registered voters
Total registered voters, over time
Registered voters
| Year | Total registered |
|---|---|
| 2016 | 148,840 |
| 2018 | 148,993 |
| 2020 | 159,219 |
| 2022 | 160,337 |
| 2024 | 161,584 |
Source: U.S. Election Assistance Commission (EAVS)
Once a competitive swing county on St. Louis's southern fringe, Jefferson has moved decisively toward Republican presidential candidates since 2000, reflecting a broader realignment among working-class white voters in Missouri's outer suburbs.
Across the recorded series it reached a Democratic high of 41.1 points in 1964 and a Republican high of 36.7 points in 2024. Between 2020 and 2024 the county moved 3.3 points toward the Republican candidate; the 2024 margin was 36.7 points.
A population of 229,458, a 89% non-Hispanic-white share, and a median household income of $82,851 describe the county. The county's voting pattern over the last decade is most similar to that of Washington County and St. Francois County.
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Jefferson County, Missouri. Akashic. https://akashic.app/county/29099/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did Jefferson County, Missouri vote in 2024?
In 2024, Jefferson County, Missouri voted Republican by 36.7 points (R+36.7), carried by the Republican candidate. Out of 119,314 votes cast, 36,965 went Democratic and 80,796 went Republican.
When did Jefferson County, Missouri last vote Democratic?
The most recent presidential election in which Jefferson County, Missouri voted Democratic was 2008.
How many people live in Jefferson County, Missouri?
Jefferson County, Missouri has a population of 229,458 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Missouri?
Median household income in Jefferson County, Missouri is $82,851 — above the national median of $80,734. The Missouri state median is $70,702.
What is the political history of Jefferson County, Missouri?
Akashic tracks 38 presidential elections in Jefferson County, Missouri from 1876 to 2024. Of those, 18 went Democratic and 16 went Republican.