Wisconsin 18th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1932
64.5%
17,286 votes · D+31.5 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 63.8%
Republican
Dwight D. Eisenhower1956
67.6%
23,325 votes · R+36.3 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 65.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
53,338votes
61.2% of the vote · D+24.3 · modeled estimate
Runner-up · Barack Obama, 2012 · 49,660 votes
Republican
Donald Trump2024
40,829votes
44.8% of the vote · D+8.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 40,600 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
Grover Cleveland1892
+18.3pts D vs U.S.
Place D+20.0 · U.S. D+1.7 · modeled estimate
Runner-up · Barack Obama, 2008 · +17.0 pts
Republican
Dwight D. Eisenhower1956
+20.9pts R vs U.S.
Place R+36.3 · U.S. R+15.4 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · +18.1 pts
current representation
Current officeholders
DKristin Dassler-AlfheimState Senate · 18
State legislative officeholder from OpenStates nightly current-legislator data.
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 is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2024
R
45.1%43,859
54.9%53,469
97,328
2020
R
39.5%24,512
60.5%37,535
62,047
2018
R
41.8%20,792
58.2%28,894
49,686
Centered in Milwaukee, this district delivered a 66-point Democratic margin in 2024, making it an outlier in a state where statewide races routinely land within a few percentage points.
Across the recorded series it reached a Democratic high of 33.2 points in 1936 and a Republican high of 40.2 points in 1920. The 2024 margin was 8.7 points.
A population of 178,262, a 81% non-Hispanic-white share, and a median household income of $68,765 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 30 and State Senate District 31.
Akashic
Political twins — state-senate districts
The state-senate districts 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.
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Wisconsin 18th State Senate District. Akashic. https://akashic.app/sld-upper/55018/. Accessed May 20, 2026. License: CC BY 4.0.
How did Wisconsin 18th State Senate District vote in 2024?
In 2024, Wisconsin 18th State Senate District voted Democratic by 8.7 points (D+8.7), carried by the Democratic candidate. Out of 91,153 votes cast, 48,788 went Democratic and 40,829 went Republican.
When did Wisconsin 18th State Senate District last vote Republican?
The most recent presidential election in which Wisconsin 18th State Senate District voted Republican was 1984.
How many people live in Wisconsin 18th State Senate District?
Wisconsin 18th State Senate District has a population of 178,262 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Wisconsin 18th State Senate District?
Median household income in Wisconsin 18th State Senate District is $68,765 — below the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of Wisconsin 18th State Senate District?
Akashic tracks 38 presidential elections in Wisconsin 18th State Senate District from 1876 to 2024. Of those, 23 went Democratic and 14 went Republican.