Jefferson County, Missouri
Precinct data
Results by precinct
51 precincts · 119,314 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -SECKMAN MIDDLE SCHOOLSECKMAN MIDDLE SCHOOL | 1,338 | 2,800 | 46 | 4,184 | 32.0% | 66.9% | R+34.9 |
|---|---|---|---|---|---|---|---|
| Precinct -WINDSOR INTERMEDIATE SCHOOLWINDSOR INTERMEDIATE SCHOOL | 1,317 | 2,725 | 57 | 4,099 | 32.1% | 66.5% | R+34.3 |
| Precinct -GEORGE GUFFEY ELEM SCHOOLGEORGE GUFFEY ELEM SCHOOL | 1,386 | 2,301 | 57 | 3,744 | 37.0% | 61.5% | R+24.4 |
| Precinct -JEFFERSON HIGH SCHOOLJEFFERSON HIGH SCHOOL | 1,001 | 2,588 | 36 | 3,625 | 27.6% | 71.4% | R+43.8 |
| Precinct -SIMPSON ELEMENTARY SCHOOLSIMPSON ELEMENTARY SCHOOL | 1,187 | 2,296 | 56 | 3,539 | 33.5% | 64.9% | R+31.3 |
| Precinct -GRACELIFE CHAPELGRACELIFE CHAPEL | 917 | 2,442 | 35 | 3,394 | 27.0% | 72.0% | R+44.9 |
| Precinct -FIRST UNITED METHODIST CHURCHFIRST UNITED METHODIST CHURCH | 1,048 | 2,073 | 43 | 3,164 | 33.1% | 65.5% | R+32.4 |
| Precinct -ST PAUL'S LUTHERN CHURCHST PAUL'S LUTHERN CHURCH | 981 | 2,133 | 37 | 3,151 | 31.1% | 67.7% | R+36.6 |
| Precinct -DE SOTO ELKS LODGEDE SOTO ELKS LODGE | 936 | 2,084 | 39 | 3,059 | 30.6% | 68.1% | R+37.5 |
| Precinct -AMERICAN LEGION POST 283AMERICAN LEGION POST 283 | 963 | 2,035 | 41 | 3,039 | 31.7% | 67.0% | R+35.3 |
| Precinct -BIG RIVER VFW POST 5331BIG RIVER VFW POST 5331 | 831 | 2,183 | 25 | 3,039 | 27.3% | 71.8% | R+44.5 |
| Precinct -MURPHY ELEMENTARY SCHOOLMURPHY ELEMENTARY SCHOOL | 1,048 | 1,931 | 46 | 3,025 | 34.6% | 63.8% | R+29.2 |
| Precinct -WINDSOR LIBRARY JCWINDSOR LIBRARY JC | 913 | 2,004 | 47 | 2,964 | 30.8% | 67.6% | R+36.8 |
| Precinct -PEVELY CITY HALLPEVELY CITY HALL | 884 | 2,023 | 39 | 2,946 | 30.0% | 68.7% | R+38.7 |
| Precinct -BROOKDALE FARMSBROOKDALE FARMS | 1,007 | 1,889 | 34 | 2,930 | 34.4% | 64.5% | R+30.1 |
| Precinct -HERCULANEUM AMVETS POST 42HERCULANEUM AMVETS POST 42 | 847 | 1,995 | 38 | 2,880 | 29.4% | 69.3% | R+39.9 |
| Precinct -ANTONIA MIDDLE SCHOOLANTONIA MIDDLE SCHOOL | 842 | 1,997 | 33 | 2,872 | 29.3% | 69.5% | R+40.2 |
| Precinct -ARNOLD VFW 2593ARNOLD VFW 2593 | 1,016 | 1,776 | 49 | 2,841 | 35.8% | 62.5% | R+26.8 |
| Precinct -RIDGEWOOD MIDDLE SCHOOLRIDGEWOOD MIDDLE SCHOOL | 927 | 1,846 | 37 | 2,810 | 33.0% | 65.7% | R+32.7 |
| Precinct -ARNOLD RECREATION CTRARNOLD RECREATION CTR | 938 | 1,732 | 46 | 2,716 | 34.5% | 63.8% | R+29.2 |
| Precinct -BRENNAN WOODS ELEM SCHOOLBRENNAN WOODS ELEM SCHOOL | 906 | 1,764 | 34 | 2,704 | 33.5% | 65.2% | R+31.7 |
| Precinct -ST. JOHN'S LUTHERN CHURCHST. JOHN'S LUTHERN CHURCH | 814 | 1,731 | 32 | 2,577 | 31.6% | 67.2% | R+35.6 |
| Precinct -NEW HOPE FELLOWSHIPNEW HOPE FELLOWSHIP | 808 | 1,713 | 30 | 2,551 | 31.7% | 67.2% | R+35.5 |
| Precinct -MISSISSIPPI RIVER EAGLESMISSISSIPPI RIVER EAGLES | 843 | 1,604 | 34 | 2,481 | 34.0% | 64.7% | R+30.7 |
| Precinct -ATHENA ELEMENTARY SCHOOLATHENA ELEMENTARY SCHOOL | 635 | 1,806 | 37 | 2,478 | 25.6% | 72.9% | R+47.3 |
| Precinct -FOX C6 SERVICE CTRFOX C6 SERVICE CTR | 753 | 1,501 | 27 | 2,281 | 33.0% | 65.8% | R+32.8 |
| Precinct -SUNRISE SCHOOLSUNRISE SCHOOL | 615 | 1,535 | 23 | 2,173 | 28.3% | 70.6% | R+42.3 |
| Precinct -NW EARLY CHILDHOOD CTRNW EARLY CHILDHOOD CTR | 603 | 1,490 | 28 | 2,121 | 28.4% | 70.2% | R+41.8 |
| Precinct -HILLSBORO CHRISTIAN CHURCHHILLSBORO CHRISTIAN CHURCH | 559 | 1,500 | 27 | 2,086 | 26.8% | 71.9% | R+45.1 |
| Precinct -TRANSFORMATION METHODIST CHURCHTRANSFORMATION METHODIST CHURCH | 582 | 1,427 | 29 | 2,038 | 28.6% | 70.0% | R+41.5 |
| Precinct -COMPASS HEALTH NETWORKCOMPASS HEALTH NETWORK | 675 | 1,300 | 26 | 2,001 | 33.7% | 65.0% | R+31.2 |
| Precinct -HILLSBORO CIVIC CENTERHILLSBORO CIVIC CENTER | 513 | 1,455 | 24 | 1,992 | 25.8% | 73.0% | R+47.3 |
| Precinct -FESTUS SCHOOL-PERFORMING ARTS CENTERFESTUS SCHOOL-PERFORMING ARTS CENTER | 635 | 1,308 | 17 | 1,960 | 32.4% | 66.7% | R+34.3 |
| Precinct -NORTHWEST HIGH SCHOOLNORTHWEST HIGH SCHOOL | 575 | 1,320 | 25 | 1,920 | 29.9% | 68.8% | R+38.8 |
| Precinct -FAITH BAPTIST CHURCHFAITH BAPTIST CHURCH | 544 | 1,279 | 15 | 1,838 | 29.6% | 69.6% | R+40.0 |
| Precinct -WOODRIDGE MIDDLE SCHOOLWOODRIDGE MIDDLE SCHOOL | 548 | 1,248 | 29 | 1,825 | 30.0% | 68.4% | R+38.4 |
| Precinct -ST. MARTIN'S UNITED CHURCH OF CHRISTST. MARTIN'S UNITED CHURCH OF CHRIST | 443 | 1,302 | 26 | 1,771 | 25.0% | 73.5% | R+48.5 |
| Precinct -CLYDE HAMRICK ELEM SCHOOLCLYDE HAMRICK ELEM SCHOOL | 525 | 1,161 | 26 | 1,712 | 30.7% | 67.8% | R+37.1 |
| Precinct -REDEEMER LUTHERN CHURCHREDEEMER LUTHERN CHURCH | 426 | 1,098 | 19 | 1,543 | 27.6% | 71.2% | R+43.6 |
| Precinct -SALVATION ARMY WORSHIP CENTERSALVATION ARMY WORSHIP CENTER | 529 | 990 | 21 | 1,540 | 34.4% | 64.3% | R+29.9 |
| Precinct -LONEDELL ELEM SCHOOLLONEDELL ELEM SCHOOL | 512 | 993 | 22 | 1,527 | 33.5% | 65.0% | R+31.5 |
| Precinct -GRANDVIEW MIDDLE SCHOOLGRANDVIEW MIDDLE SCHOOL | 388 | 1,106 | 22 | 1,516 | 25.6% | 73.0% | R+47.4 |
| Precinct -SALINE VALLEY FIREHOUSE #1SALINE VALLEY FIREHOUSE #1 | 508 | 897 | 19 | 1,424 | 35.7% | 63.0% | R+27.3 |
| Precinct -HEMATITE CHRISTIAN CHURCHHEMATITE CHRISTIAN CHURCH | 403 | 963 | 14 | 1,380 | 29.2% | 69.8% | R+40.6 |
| Precinct -HILLSBORO CITY HALLHILLSBORO CITY HALL | 345 | 980 | 24 | 1,349 | 25.6% | 72.6% | R+47.1 |
| Precinct -MERAMEC HEIGHTS ELEM SCHOOLMERAMEC HEIGHTS ELEM SCHOOL | 416 | 846 | 17 | 1,279 | 32.5% | 66.1% | R+33.6 |
| Precinct -PACIFIC FIREHOUSE3PACIFIC FIREHOUSE3 | 398 | 756 | 21 | 1,175 | 33.9% | 64.3% | R+30.5 |
| Precinct -CIA HALLCIA HALL | 273 | 826 | 12 | 1,111 | 24.6% | 74.3% | R+49.8 |
| Precinct -LIBERTY FELLOWSHIP CHURCHLIBERTY FELLOWSHIP CHURCH | 243 | 758 | 10 | 1,011 | 24.0% | 75.0% | R+50.9 |
| Precinct -FESTUS K.C. HALLFESTUS K.C. HALL | 363 | 599 | 17 | 979 | 37.1% | 61.2% | R+24.1 |
| Precinct -DE SOTO K.C. HALLDE SOTO K.C. HALL | 258 | 687 | 5 | 950 | 27.2% | 72.3% | R+45.2 |
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% |
U.S. Senate
Registered voters
Total registered voters, over time
| Year | Total registered |
|---|---|
| 2016 | 148,840 |
| 2018 | 148,993 |
| 2020 | 159,219 |
| 2022 | 160,337 |
| 2024 | 161,584 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+1,000 net domestic migration · 2025
Net +6,467 over 2011–2025 · gain loss
Arrivals reported $60,160 in average income, against $75,669 for residents who stayed — 20% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+9.7 on average — 46 points more Democratic-leaning than Jefferson County, MO itself (R+36.7).
Where arrivals came from lean of each source
- St. Louis County, MO2,205D+23.4
- St. Louis city, MO508D+64.6
- St. Charles County, MO283R+17.0
- St. Francois County, MO227R+51.4
- Franklin County, MO219R+45.9
- St. Clair County, IL126D+7.8
Where departures went households, 2022–23
- St. Louis County, MO1,779
- St. Louis city, MO351
- Franklin County, MO283
- St. Francois County, MO266
- St. Charles County, MO253
- Madison County, IL94
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −467 |
| 2012 | −576 |
| 2013 | +225 |
| 2014 | +369 |
| 2015 | +496 |
| 2016 | −359 |
| 2017 | −125 |
| 2018 | +201 |
| 2019 | +329 |
| 2021 | +1,082 |
| 2022 | +1,518 |
| 2023 | +1,957 |
| 2024 | +817 |
| 2025 | +1,000 |
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 Stark County and Monroe County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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 →
Jefferson County, Missouri. Akashic. https://akashic.app/county/29099/. Accessed May 20, 2026. License: CC BY 4.0.