HarrisDemocratic41.0%20,574TrumpRepublican57.4%28,771KennedyNonpartisan0.6%294
R+16.3- Lead
- 8,197
- Total
- 50,146
- vs nation
- R+14.9
- Turnout
- 76.5%
Akashiccounty
Jefferson County, WI
Contests in this Place (90 available)
President34 · 1892–2024 · 3 mapped
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
President results by year
2024 turnout 76.5% of 66,966 citizens 18+
BidenDemocratic41.5%19,904TrumpRepublican56.7%27,208JorgensenLibertarian1.3%634
R+15.2- Lead
- 7,304
- Total
- 47,979
- vs nation
- R+19.7
- Turnout
- 75.0%
ClintonDemocratic38.4%16,569TrumpRepublican54.3%23,417JohnsonLibertarian3.9%1,662
R+15.9- Lead
- 6,848
- Total
- 43,109
- vs nation
- R+18.0
- Turnout
- 69.6%
ObamaDemocratic45.5%20,158RomneyRepublican53.1%23,517GrayIndependent0.7%303
R+7.6- Lead
- 3,359
- Total
- 44,281
- vs nation
- R+11.4
- Turnout
- —
ObamaDemocratic49.7%21,448McCainRepublican48.9%21,096OtherAll other candidates1.4%622
D+0.8- Lead
- 352
- Total
- 43,166
- vs nation
- R+6.5
- Turnout
- —
KerryDemocratic42.6%17,925BushRepublican56.5%23,776OtherAll other candidates1.0%414
R+13.9- Lead
- 5,851
- Total
- 42,115
- vs nation
- R+11.4
- Turnout
- —
GoreDemocratic42.1%15,203BushRepublican53.2%19,204NaderGreen3.8%1,361
R+11.1- Lead
- 4,001
- Total
- 36,099
- vs nation
- R+11.6
- Turnout
- —
ClintonDemocratic44.3%13,188DoleRepublican42.6%12,681PerotReform10.7%3,177
D+1.7- Lead
- 507
- Total
- 29,774
- vs nation
- R+6.8
- Turnout
- —
Key facts
- 2024 presidential margin
- R+16.3MIT Election Lab
- Population
- 86,0032024 5-year
- Population density
- 155 / sq mi2024 5-year · TIGER/Line
- Land area
- 557 sq miTIGER/Line
- Median household income
- $83,7502024 5-year
- White (non-Hispanic)
- 87.0%2024 5-year
- Black
- 0.9%2024 5-year
- Hispanic / Latino
- 8.5%2024 5-year
- Peak Democratic margin
- D+37.5 in 1932MIT Election Lab
- Peak Republican margin
- R+63.7 in 1920MIT Election Lab
- Most similar
- Calumet County, WI · twin score 89.5
Turnout and midterm durability
Participation measured against the same-year citizen voting-age population. Audited cycles count total general-election participants — ballots or participating voters, not presidential candidate votes. Cycles before 2016 predate that series and are derived from the certified presidential returns instead; they are marked everywhere they appear and are excluded from the figures below.
2004–20248 cycles · 5 audited
- 2024 turnout
- 76.5%51,200 participants ÷ 66,966 CVAP
- 2020→2022 drop-off
- +15.7 ptsVolatile
- Drop-off vs state
- +0.2 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026
- 60.7%–64.2%Recent-cycle and two-cycle persistence scenarios; not a forecast
Participation by cycle
Presidential Midterm Derived, pre-2016
Select a presidential cycle to show it on the map and results ledger above.
| Cycle | Participants | CVAP | Turnout | Series | Quality |
|---|---|---|---|---|---|
| 51,200 | 66,966 ± 506 | 76.5% | Audited | C/A | |
| 2022Mid | 39,621 | 66,858 ± 455 | 59.3% | Audited | C/A |
| 49,064 | 65,433 ± 315 | 75.0% | Audited | C/A | |
| 2018Mid | 39,247 | 64,560 ± 288 | 60.8% | Audited | C/A |
| 44,342 | 63,747 ± 297 | 69.6% | Audited | D/A | |
| 44,281 | 61,791 | 71.7% | Derived | — | |
| 43,166 | 59,479 | 72.6% | Derived | — | |
| 42,115 | 57,167 extrapolated | 73.7% | Derived | — |
Sources and methods
Audited cycles (2016, 2018, 2020, 2022, 2024) count total general-election participants against the same-year CVAP special tabulation, each cell carrying its own numerator and denominator quality grade. Derived cycles (2004, 2008, 2012) come from the certified presidential returns on this page over the ACS 5-year CVAP series, so they measure presidential votes cast rather than ballots — a floor on participation. Where a derived cycle predates the ACS its denominator is extrapolated rather than read, and says so on its own line below. They are shown for the longer arc and are excluded from the drop-off, excess-drop-off, and 2026 scenario figures above.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:partially allocated; allocation share 18.7%; series 312/228.
- 2022: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:partially allocated; allocation share 18.0%; series 307/183.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:partially allocated; allocation share 18.8%; series 302/2.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:partially allocated; allocation share 18.9%; series 298/138.
- 2016: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:partially allocated; allocation share 20.3%; series 294/111.
- 2012 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2008 (derived): Certified presidential returns · ACS 5-year CVAP (B05003); presidential votes cast — a floor on participation, not a ballot count.
- 2004 (derived): Certified presidential returns · extrapolated CVAP denominator; presidential votes cast — a floor on participation, not a ballot count; 2004 predates the ACS, so the denominator is a linear back-extrapolation from the 2008 and 2012 CVAP values, not a read figure.
Interactive election map
One map. Every available contest.
Explore precinct resultsSearch, sort, compare years, or export CSV · 34 precincts
Precinct data
Results by precinct
34 precincts · 50,146 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -CITY OF FORT ATKINSON WARDS 1-13CITY OF FORT ATKINSON WARDS 1-13 | 3,530 | 3,138 | 95 | 6,763 | 52.2% | 46.4% | D+5.8 |
|---|---|---|---|---|---|---|---|
| Precinct -CITY OF JEFFERSON WARDS 1-10CITY OF JEFFERSON WARDS 1-10 | 1,937 | 2,172 | 84 | 4,193 | 46.2% | 51.8% | R+5.6 |
| Precinct -CITY OF LAKE MILLS WARDS 1-8CITY OF LAKE MILLS WARDS 1-8 | 2,173 | 1,855 | 66 | 4,094 | 53.1% | 45.3% | D+7.8 |
| Precinct -TOWN OF IXONIA WARDS 1-6TOWN OF IXONIA WARDS 1-6 | 887 | 2,289 | 52 | 3,228 | 27.5% | 70.9% | R+43.4 |
| Precinct -TOWN OF KOSHKONONG WARDS 1-6TOWN OF KOSHKONONG WARDS 1-6 | 889 | 1,466 | 51 | 2,406 | 36.9% | 60.9% | R+24.0 |
| Precinct -TOWN OF OAKLAND WARDS 1-4TOWN OF OAKLAND WARDS 1-4 | 1,178 | 1,031 | 28 | 2,237 | 52.7% | 46.1% | D+6.6 |
| Precinct -CITY OF WATERLOO WARDS 1-5CITY OF WATERLOO WARDS 1-5 | 947 | 993 | 17 | 1,957 | 48.4% | 50.7% | R+2.4 |
| Precinct -VILLAGE OF JOHNSON CREEK WARDS 1-4VILLAGE OF JOHNSON CREEK WARDS 1-4 | 755 | 1,133 | 38 | 1,926 | 39.2% | 58.8% | R+19.6 |
| Precinct -CITY OF WATERTOWN WARDS 20-22CITY OF WATERTOWN WARDS 20-22 | 527 | 1,093 | 22 | 1,642 | 32.1% | 66.6% | R+34.5 |
| Precinct -TOWN OF LAKE MILLS WARDS 1-3TOWN OF LAKE MILLS WARDS 1-3 | 804 | 748 | 26 | 1,578 | 51.0% | 47.4% | D+3.5 |
| Precinct -TOWN OF SULLIVAN WARDS 1-4TOWN OF SULLIVAN WARDS 1-4 | 425 | 1,130 | 16 | 1,571 | 27.1% | 71.9% | R+44.9 |
| Precinct -CITY OF WATERTOWN WARDS 16-17CITY OF WATERTOWN WARDS 16-17 | 573 | 807 | 38 | 1,418 | 40.4% | 56.9% | R+16.5 |
| Precinct -TOWN OF CONCORD WARDS 1-2TOWN OF CONCORD WARDS 1-2 | 403 | 960 | 18 | 1,381 | 29.2% | 69.5% | R+40.3 |
| Precinct -TOWN OF WATERTOWN WARDS 1-2TOWN OF WATERTOWN WARDS 1-2 | 363 | 978 | 12 | 1,353 | 26.8% | 72.3% | R+45.5 |
| Precinct -CITY OF WATERTOWN WARDS 18-19CITY OF WATERTOWN WARDS 18-19 | 511 | 801 | 24 | 1,336 | 38.2% | 60.0% | R+21.7 |
| Precinct -CITY OF WATERTOWN WARDS 11-13CITY OF WATERTOWN WARDS 11-13 | 393 | 806 | 22 | 1,221 | 32.2% | 66.0% | R+33.8 |
| Precinct -CITY OF WATERTOWN WARDS 9-10CITY OF WATERTOWN WARDS 9-10 | 399 | 627 | 23 | 1,049 | 38.0% | 59.8% | R+21.7 |
| Precinct -VILLAGE OF PALMYRA WARDS 1-2VILLAGE OF PALMYRA WARDS 1-2 | 304 | 698 | 20 | 1,022 | 29.7% | 68.3% | R+38.6 |
| Precinct -TOWN OF FARMINGTON WARDS 1-3TOWN OF FARMINGTON WARDS 1-3 | 287 | 694 | 10 | 991 | 29.0% | 70.0% | R+41.1 |
| Precinct -TOWN OF JEFFERSON WARDS 1-2TOWN OF JEFFERSON WARDS 1-2 | 287 | 606 | 12 | 905 | 31.7% | 67.0% | R+35.2 |
| Precinct -CITY OF WATERTOWN WARDS 14-15CITY OF WATERTOWN WARDS 14-15 | 327 | 543 | 29 | 899 | 36.4% | 60.4% | R+24.0 |
| Precinct -TOWN OF PALMYRA WARDS 1-2TOWN OF PALMYRA WARDS 1-2 | 260 | 587 | 11 | 858 | 30.3% | 68.4% | R+38.1 |
| Precinct -TOWN OF MILFORD WARDS 1-2TOWN OF MILFORD WARDS 1-2 | 285 | 457 | 9 | 751 | 37.9% | 60.9% | R+22.9 |
| Precinct -TOWN OF HEBRON WARDS 1-2TOWN OF HEBRON WARDS 1-2 | 229 | 493 | 12 | 734 | 31.2% | 67.2% | R+36.0 |
| Precinct -TOWN OF WATERLOO WARD 1TOWN OF WATERLOO WARD 1 | 248 | 374 | 8 | 630 | 39.4% | 59.4% | R+20.0 |
| Precinct -CITY OF WHITEWATER WARDS 11-12CITY OF WHITEWATER WARDS 11-12 | 326 | 276 | 7 | 609 | 53.5% | 45.3% | D+8.2 |
| Precinct -TOWN OF SUMNER WARD 1TOWN OF SUMNER WARD 1 | 219 | 359 | 12 | 590 | 37.1% | 60.8% | R+23.7 |
| Precinct -TOWN OF AZTALAN WARDS 1,3TOWN OF AZTALAN WARDS 1,3 | 226 | 326 | 6 | 558 | 40.5% | 58.4% | R+17.9 |
| Precinct -TOWN OF COLD SPRING WARD 1TOWN OF COLD SPRING WARD 1 | 178 | 314 | 8 | 500 | 35.6% | 62.8% | R+27.2 |
| Precinct -CITY OF WHITEWATER WARD 13CITY OF WHITEWATER WARD 13 | 259 | 212 | 8 | 479 | 54.1% | 44.3% | D+9.8 |
| Precinct -TOWN OF JEFFERSON WARDS 3-4TOWN OF JEFFERSON WARDS 3-4 | 167 | 308 | 3 | 478 | 34.9% | 64.4% | R+29.5 |
| Precinct -VILLAGE OF SULLIVAN WARDS 1-2VILLAGE OF SULLIVAN WARDS 1-2 | 116 | 271 | 3 | 390 | 29.7% | 69.5% | R+39.7 |
| Precinct -TOWN OF AZTALAN WARDS 2,4TOWN OF AZTALAN WARDS 2,4 | 131 | 197 | 11 | 339 | 38.6% | 58.1% | R+19.5 |
| Precinct -VILLAGE OF CAMBRIDGE WARD 1VILLAGE OF CAMBRIDGE WARD 1 | 31 | 29 | 0 | 60 | 51.7% | 48.3% | D+3.3 |
presidential history
Party record book
Jefferson County, WI · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
68.3%
11,230 votes · D+37.5
Runner-up · Franklin D. Roosevelt, 1936 · 64.3%
Republican
Warren G. Harding1920
80.4%
8,865 votes · R+63.7
Runner-up · Dwight D. Eisenhower, 1956 · 67.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
21,448votes
49.7% of the vote · D+0.8
Runner-up · Kamala Harris, 2024 · 20,574 votes
Republican
Donald Trump2024
28,771votes
57.4% of the vote · R+16.3
Runner-up · Donald Trump, 2020 · 27,208 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
William J. Bryan1908
+25.8pts D vs U.S.
Place D+16.2 · U.S. R+9.6
Runner-up · Grover Cleveland, 1892 · +24.5 pts
Republican
Warren G. Harding1920
+37.5pts R vs U.S.
Place R+63.7 · U.S. R+26.2
Runner-up · Thomas E. Dewey, 1944 · +26.3 pts
current representation
Current officeholders
RJohn JaglerState Senate · 13
DMelissa RatcliffState Senate · 16
RChris KapengaState Senate · 33
RWill PentermanState House · 38
DJoan FitzgeraldState House · 46
RCindi DuchowState House · 97
RBarbara DittrichState House · 99
Seats representing Jefferson County, WI. A county elects none of these itself — they are the members for the 1 congressional, 3 state senate and 4 state house districts it falls inside, so parts of the county are represented by different members.
U.S. House elections · 3 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−145 net domestic migration · 2025
20112025
Net −1,213 over 2011–2025 · gain loss
Arrivals reported $59,425 in average income, against $83,876 for residents who stayed — 29% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+4.7 on average — 21 points more Democratic-leaning than Jefferson County, WI itself (R+16.3).
Where arrivals came from lean of each source
- Dane County, WI431D+51.5
- Waukesha County, WI355R+19.7
- Dodge County, WI268R+32.9
- Walworth County, WI178R+22.2
- Rock County, WI133D+7.3
- Milwaukee County, WI128D+38.4
Where departures went households, 2022–23
- Dane County, WI388
- Waukesha County, WI332
- Dodge County, WI268
- Rock County, WI194
- Walworth County, WI141
- Milwaukee County, WI114
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 | −203 |
| 2012 | +185 |
| 2013 | −32 |
| 2014 | −542 |
| 2015 | −101 |
| 2016 | −201 |
| 2017 | +87 |
| 2018 | +188 |
| 2019 | −450 |
| 2021 | −346 |
| 2022 | +72 |
| 2023 | +87 |
| 2024 | +188 |
| 2025 | −145 |
Jefferson County sits in the Glacial Drumlin region southwest of Milwaukee, where a manufacturing and agricultural economy anchors a largely white, working-class electorate. Its 2024 margin of R+16.4 reflects a long drift from the competitive swings it recorded in the early 2000s.
Across the recorded series it reached a Democratic high of 37.5 points in 1932 and a Republican high of 63.7 points in 1920. Between 2020 and 2024 the county moved 1.1 points toward the Republican candidate; the 2024 margin was 16.3 points.
A population of 86,003, a 87% non-Hispanic-white share, and a median household income of $83,750 describe the county. The county's voting pattern over the last decade is most similar to that of Calumet County and Winnebago County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Calumet County
Wisconsin
89.5twin score
2008–2024 trajectoryGerman ancestrymedian income
Winnebago County
Wisconsin
88.2twin score
elasticityPolish ancestryGerman ancestry
Wood County
Wisconsin
84.7twin score
German ancestryelasticity2012–2024 trajectory≠ Polish ancestry
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Jefferson County, Wisconsin. Akashic. https://akashic.app/county/55055/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did Jefferson County, Wisconsin vote in 2024?
In 2024, Jefferson County, Wisconsin voted Republican by 16.3 points (R+16.3), carried by the Republican candidate. Out of 50,146 votes cast, 20,574 went Democratic and 28,771 went Republican.
When did Jefferson County, Wisconsin last vote Democratic?
The most recent presidential election in which Jefferson County, Wisconsin voted Democratic was 2008.
How many people live in Jefferson County, Wisconsin?
Jefferson County, Wisconsin has a population of 86,003 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Wisconsin?
Median household income in Jefferson County, Wisconsin is $83,750 — above the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of Jefferson County, Wisconsin?
Akashic tracks 38 presidential elections in Jefferson County, Wisconsin from 1876 to 2024. Of those, 10 went Democratic and 23 went Republican.