St. Charles County, Missouri
AkashicSt. Charles County, MOTrumpR+17.0
2024 precinct map of St. Charles CountyPrecinct-level 2024 presidential results for St. Charles 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 | 57.7% | 130,588 |
|---|---|---|
| Kamala HarrisDemocratic | 40.8% | 92,226 |
| Chase OliverLibertarian | 0.9% | 2,048 |
Harris +50Trump +50
115 precincts · 226,166 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 | 40.8%Harris92,226 | 57.7%Trump130,588 | 0.9%Oliver2,048 | 226,166 | ||
| R | 40.2%Biden89,530 | 57.7%Trump128,389 | 1.5%Jorgensen3,317 | 222,566 | ||
| R | 33.8%Clinton68,626 | 59.9%Trump121,650 | 3.9%Johnson7,964 | 203,184 | ||
| R | 38.5%Obama71,838 | 59.4%Romney110,784 | 1.5%Gray2,709 | 186,366 | ||
| R | 44.7%Obama84,183 | 54.4%McCain102,550 | 1.0%Nader1,796 | 188,529 | ||
| R | 40.9%Kerry66,855 | 58.6%Bush95,826 | 0.5%Badnarik807 | 163,488 | ||
| R | 41.8%Gore53,806 | 56.0%Bush72,114 | 1.5%Nader1,900 | 128,686 | ||
| R | 40.5%Clinton41,369 | 46.7%Dole47,705 | 11.3%Perot11,591 | 102,246 | ||
| R | 35.0%Clinton37,263 | 36.3%Bush38,673 | 28.5%Perot30,351 | 106,563 | ||
| R | 36.8%Dukakis29,286 | 62.9%Bush50,005 | 0.3%Fulani209 | 79,500 | ||
| R | 26.9%Mondale17,617 | 73.1%Reagan47,784 | 0.0% | 65,401 | ||
| R | 34.6%Carter20,668 | 60.3%Reagan36,050 | 5.1%Anderson3,050 | 59,768 | ||
| R | 45.3%Carter22,063 | 53.6%Ford26,105 | 1.1%McCarthy536 | 48,704 | ||
| R | 30.1%McGovern11,034 | 69.9%Nixon25,677 | 0.0% | 36,711 | ||
| R | 35.0%Humphrey10,374 | 45.6%Nixon13,533 | 19.4%Wallace5,752 | 29,659 | ||
| D | 61.7%Johnson14,530 | 38.3%Goldwater9,020 | 0.0% | 23,550 | ||
| D | 52.2%Kennedy11,890 | 47.8%Nixon10,888 | 0.0% | 22,778 | ||
| R | 44.6%Stevenson7,618 | 55.4%Eisenhower9,462 | 0.0% | 17,080 | ||
| R | 43.4%Stevenson6,493 | 56.5%Eisenhower8,451 | 0.1%Hallinan20 | 14,964 | ||
| D | 50.1%Truman6,049 | 49.5%Dewey5,976 | 0.3%Thurmond39 | 12,064 | ||
| R | 40.8%Roosevelt4,880 | 58.9%Dewey7,050 | 0.3%Thomas36 | 11,966 | ||
| R | 40.5%Roosevelt5,334 | 59.1%Willkie7,792 | 0.4%Thomas50 | 13,176 | ||
| D | 48.9%Roosevelt5,903 | 42.7%Landon5,156 | 8.4%Lemke1,009 | 12,068 | ||
| D | 64.4%Roosevelt6,911 | 34.1%Hoover3,664 | 1.5%Thomas162 | 10,737 | ||
| R | 48.4%Smith5,081 | 51.4%Hoover5,404 | 0.2%Thomas22 | 10,507 | ||
| R | 29.9%Davis2,364 | 59.1%Coolidge4,668 | 11.0%La Follette865 | 7,897 | ||
| R | 26.8%Cox2,472 | 72.1%Harding6,645 | 1.0%Debs96 | 9,213 | ||
| R | 34.9%Wilson1,914 | 64.2%Hughes3,518 | 0.9%Benson51 | 5,483 | ||
| R | 37.4%Wilson1,792 | 49.0%Taft2,350 | 13.6%Roosevelt654 | 4,796 | ||
| R | 35.7%Bryan1,979 | 62.8%Taft3,480 | 1.4%Debs79 | 5,538 | ||
| R | 35.1%Parker1,788 | 62.9%Roosevelt3,203 | 2.0%Debs100 | 5,091 | ||
| R | 41.0%Bryan2,343 | 58.1%McKinley3,324 | 0.9%Woolley54 | 5,721 | ||
| R | 43.3%Bryan2,448 | 56.1%McKinley3,173 | 0.5%Palmer30 | 5,651 | ||
| R | 49.3%Cleveland2,485 | 50.0%Harrison2,522 | 0.7%Weaver37 | 5,044 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −0.7% |
| 1896 | −12.8% |
| 1900 | −17.1% |
| 1904 | −27.8% |
| 1908 | −27.1% |
| 1912 | −11.6% |
| 1916 | −29.3% |
| 1920 | −45.3% |
| 1924 | −29.2% |
| 1928 | −3.1% |
| 1932 | +30.2% |
| 1936 | +6.2% |
| 1940 | −18.7% |
| 1944 | −18.1% |
| 1948 | +0.6% |
| 1952 | −13.1% |
| 1956 | −10.8% |
| 1960 | +4.4% |
| 1964 | +23.4% |
| 1968 | −10.7% |
| 1972 | −39.9% |
| 1976 | −8.3% |
| 1980 | −25.7% |
| 1984 | −46.1% |
| 1988 | −26.1% |
| 1992 | −1.3% |
| 1996 | −6.2% |
| 2000 | −14.2% |
| 2004 | −17.7% |
| 2008 | −9.7% |
| 2012 | −20.9% |
| 2016 | −26.1% |
| 2020 | −17.5% |
| 2024 | −17.0% |
DemocraticRepublican
voter registration
Registered voters
Total registered voters, over time
Registered voters
| Year | Total registered |
|---|---|
| 2016 | 275,928 |
| 2018 | 270,824 |
| 2020 | 291,649 |
| 2022 | 289,075 |
| 2024 | 291,246 |
Source: U.S. Election Assistance Commission (EAVS)
St. Charles County has been one of Missouri's fastest-growing counties for two decades, fueled by suburban expansion from St. Louis. That population surge has not softened its Republican lean, which held at R+17 in 2024.
Across the recorded series it reached a Democratic high of 30.2 points in 1932 and a Republican high of 46.1 points in 1984. The 2024 margin was 17.0 points.
A population of 414,535, a 83% non-Hispanic-white share, and a median household income of $104,692 describe the county. The county's voting pattern over the last decade is most similar to that of Dare County and Clarke County.
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
St. Charles County, Missouri. Akashic. https://akashic.app/county/29183/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did St. Charles County, Missouri vote in 2024?
In 2024, St. Charles County, Missouri voted Republican by 17.0 points (R+17.0), carried by the Republican candidate. Out of 226,166 votes cast, 92,226 went Democratic and 130,588 went Republican.
When did St. Charles County, Missouri last vote Democratic?
The most recent presidential election in which St. Charles County, Missouri voted Democratic was 1964.
How many people live in St. Charles County, Missouri?
St. Charles County, Missouri has a population of 414,535 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in St. Charles County, Missouri?
Median household income in St. Charles County, Missouri is $104,692 — above the national median of $80,734. The Missouri state median is $70,702.
What is the political history of St. Charles County, Missouri?
Akashic tracks 38 presidential elections in St. Charles County, Missouri from 1876 to 2024. Of those, 5 went Democratic and 29 went Republican.