Wisconsin 21st State Senate District, Wisconsin: Democratic loyalist district. In 2024, voted D+28%. Democratic peak: D+53 in 1936.
Key facts
- 2024 presidential margin
- D+28MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 256,4702024 5-year
- Median household income
- $67,3592024 5-year
- White (non-Hispanic)
- 55.1%2024 5-year
- Black
- 22.6%2024 5-year
- Hispanic / Latino
- 16.6%2024 5-year
- Peak Democratic margin
- D+53 in 1936MIT Election Lab
- Peak Republican margin
- R+37 in 1920MIT Election Lab
Constituent county margins for State Senate District 21, WIOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 82,645 | 45,693 | 130,918 | ||
| D | 83,035 | 44,403 | 129,621 | ||
| D | 74,700 | 40,406 | 122,182 | ||
| D | 87,072 | 47,426 | 135,913 | ||
| D | 84,437 | 45,291 | 131,373 | ||
| D | 78,174 | 53,809 | 133,164 | ||
| D | 66,459 | 47,808 | 119,036 | ||
| D | 57,856 | 34,350 | 102,371 | ||
| D | 60,943 | 41,906 | 125,700 | ||
| D | 69,395 | 46,736 | 116,944 | ||
| D | 66,661 | 54,411 | 121,806 | ||
| D | 61,591 | 50,948 | 123,132 | ||
| D | 64,555 | 52,089 | 120,297 | ||
| D | 53,592 | 52,449 | 109,635 | ||
| D | 52,349 | 42,611 | 104,857 | ||
| D | 73,297 | 38,589 | 112,111 | ||
| D | 64,582 | 48,922 | 113,767 | ||
| R | 44,872 | 58,336 | 103,897 | ||
| R | 51,510 | 56,271 | 108,278 | ||
| D | 47,297 | 35,464 | 86,791 | ||
| D | 51,812 | 36,061 | 89,532 | ||
| D | 52,207 | 33,744 | 88,367 | ||
| D | 55,004 | 14,942 | 75,117 | ||
| D | 42,584 | 14,890 | 65,642 | ||
| D | 27,701 | 22,691 | 53,440 | ||
| O | 3,564 | 14,663 | 39,429 | ||
| R | 6,555 | 19,978 | 36,532 | ||
| D | 8,825 | 7,468 | 20,367 | ||
| D | 7,098 | 4,614 | 17,978 | ||
| R | 6,683 | 7,755 | 18,876 | ||
| R | 4,757 | 8,640 | 18,129 | ||
| R | 6,641 | 9,217 | 17,236 | ||
| R | 6,879 | 9,446 | 16,823 | ||
| R | 6,397 | 6,453 | 13,480 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
24.2%
Polish
8.4%
Irish
8.0%
English
4.5%
Italian
4.0%
American
2.0%
French
1.7%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 36.6 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$67,359
State Senate District 21 ranks near the middle of US counties.
State Senate District 21$67,359
Wisconsin$77,485
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
15.7%
Children face moderate poverty.
Children under 1821.7%
Working age (18–64)13.9%
Seniors (65+)13.8%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
83.4%
speak English only
Spanish10.9%
Asian & Pacific Islander2.4%
Other Indo-European2.3%
Other languages1.0%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 49.9% of residents not counted as adherents by any reporting body.
Wisconsin's 21st Senate District, with roughly 179,000 residents, returned an R+4.6 presidential margin in 2024—close enough that shifts in suburban or exurban turnout can meaningfully swing both legislative and statewide races.
The Democratic margin in Wisconsin 21st State Senate District reached its widest at fifty-three points in 1936. The margin in 2024 was twenty-eight points — still decisive.
Its loyalty is rooted in its place. Median household income of $67,359, a 55% non-Hispanic-white share, and a population of 256,470 together describe a district whose political habits are deeply settled.
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.
State Senate District 21, Wisconsin. Akashic. https://akashic.app/sld-upper/55021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 21, Wisconsin vote in 2024?
In 2024, State Senate District 21, Wisconsin voted Democratic by 28.2 points (D+28), carried by the Democratic candidate. Out of 130,918 votes cast, 82,645 went Democratic and 45,693 went Republican.
What is State Senate District 21, Wisconsin's political archetype?
Akashic classifies State Senate District 21, Wisconsin as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 25 times, Republican 8 times, and other 1 times.
When did State Senate District 21, Wisconsin last vote Republican?
The most recent presidential election in which State Senate District 21, Wisconsin voted Republican was 1956.
How many people live in State Senate District 21, Wisconsin?
State Senate District 21, Wisconsin has a population of 256,470 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 21, Wisconsin?
Median household income in State Senate District 21, Wisconsin is $67,359 — below the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of State Senate District 21, Wisconsin?
Akashic tracks 38 presidential elections in State Senate District 21, Wisconsin from 1876 to 2024. Of those, 25 went Democratic and 8 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.