State Senate District 31 State Senate District (WI) — Elections 1876–2024

Wisconsin 31st State Senate District, Wisconsin: Tossup district. In 2024, voted D+3%. Republican peak: R+71 in 1920.

Key facts

2024 presidential margin: D+3MIT Election Lab
Political archetype: TossupAkashic typology
Population: 142,2582024 5-year
Median household income: $74,6472024 5-year
White (non-Hispanic): 88.6%2024 5-year
Black: 1.3%2024 5-year
Hispanic / Latino: 3.3%2024 5-year
Peak Democratic margin: D+28 in 1964MIT Election Lab
Peak Republican margin: R+71 in 1920MIT Election Lab

2024 results by constituent county

4 counties · 1 D · 3 R

R+60

D+60

One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.

38 presidential elections

Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
Year	Won	Margin	Democratic	Republican	Total
2024	D	+3.4%	42,242	39,443	82,981
2020	D	+4.1%	39,080	35,933	76,665
2016	D	+2.2%	33,943	32,370	71,711
2012	D	+11.3%	39,092	31,042	71,283
2008	D	+20.2%	42,488	27,981	71,659
2004	D	+8.3%	38,710	32,722	72,323
2000	D	+5.4%	30,927	27,597	62,181
1996	D	+15.8%	25,913	17,720	52,013
1992	D	+11.7%	27,225	20,094	60,906
1988	D	+9.2%	27,800	23,074	51,165
1984	R	−3.0%	25,082	26,663	52,034
1980	D	+0.3%	23,265	23,096	51,494
1976	D	+6.7%	24,468	21,322	46,738
1972	R	−5.4%	18,713	20,909	40,580
1968	R	−0.2%	16,032	16,114	33,979
1964	D	+28.2%	21,363	11,945	33,367
1960	R	−10.7%	15,724	19,501	35,282
1956	R	−17.4%	12,868	18,314	31,244
1952	R	−22.3%	12,801	20,149	33,007
1948	D	+11.1%	14,065	11,222	25,663
1944	R	−5.8%	12,410	13,945	26,493
1940	R	−2.3%	14,069	14,744	29,008
1936	D	+17.3%	14,624	10,157	25,792
1932	D	+7.3%	11,993	10,326	22,761
1928	R	−37.1%	6,847	15,035	22,041
1924	O	−38.7%	906	7,695	17,534
1920	R	−71.0%	1,712	11,994	14,476
1916	R	−15.2%	3,518	4,860	8,818
1912	R	−6.2%	2,644	3,143	8,009
1908	R	−37.2%	2,821	6,455	9,759
1904	R	−52.9%	1,925	6,842	9,292
1900	R	−36.9%	3,067	6,862	10,282
1896	R	−29.6%	3,708	6,977	11,044
1892	R	−7.0%	3,601	4,222	8,857
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

German

36.7%

Irish

10.1%

English

7.2%

Polish

5.7%

American

3.5%

French

3.0%

Italian

2.7%

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

0.8%

85+

1.3%

2.2%

75–84

2.9%

4.9%

65–74

5.3%

6.1%

55–64

5.9%

5.4%

45–54

5.2%

6.5%

35–44

6.0%

6.7%

25–34

6.0%

7.2%

18–24

7.8%

7.6%

5–17

7.3%

2.7%

2.5%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$74,647

State Senate District 31 ranks near the middle of US counties.

State Senate District 31$74,647

Wisconsin$77,485

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

11.5%

Child poverty is below the national average.

Children under 1810.0%

Working age (18–64)11.9%

Seniors (65+)10.3%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

93.7%

speak English only

Asian & Pacific Islander2.5%

Spanish2.3%

Other Indo-European1.3%

Other languages0.2%

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Mainline Protestant

18.7%

Catholic & Orthodox

13.7%

Other Christian

5.8%

Methodist

1.4%

Pentecostal & Holiness

1.2%

Non-Christian

1.2%

Baptist

0.3%

Source · 2020 US Religion Census. Remaining 57.7% of residents not counted as adherents by any reporting body.

Wisconsin's 31st Senate District logged a D+5.3 margin in 2024, reflecting the suburban realignment reshaping legislative maps across the upper Midwest. Turnout patterns here often signal broader statewide competitiveness.

The district's recent history is a story of close margins. The Democratic margin reached twenty-eight points in 1964; the Republican margin reached seventy-one points in 1920. Most other elections have been decided by single-digit points.

Its demographics — a population of 142,258, a 89% non-Hispanic-white share, a median household income of $74,647 — situate the district close to national averages on several dimensions.

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 31, Wisconsin. Akashic. https://akashic.app/sld-upper/55031/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

Frequently asked questions

How did State Senate District 31, Wisconsin vote in 2024?

In 2024, State Senate District 31, Wisconsin voted Democratic by 3.4 points (D+3), carried by the Democratic candidate. Out of 82,981 votes cast, 42,242 went Democratic and 39,443 went Republican.

What is State Senate District 31, Wisconsin's political archetype?

Akashic classifies State Senate District 31, Wisconsin as a "Tossup" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 16 times, Republican 17 times, and other 1 times.

When did State Senate District 31, Wisconsin last vote Republican?

The most recent presidential election in which State Senate District 31, Wisconsin voted Republican was 1984.

How many people live in State Senate District 31, Wisconsin?

State Senate District 31, Wisconsin has a population of 142,258 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 31, Wisconsin?

Median household income in State Senate District 31, Wisconsin is $74,647 — below the national median of $80,734. The Wisconsin state median is $77,485.

What is the political history of State Senate District 31, Wisconsin?

Akashic tracks 38 presidential elections in State Senate District 31, Wisconsin from 1876 to 2024. Of those, 16 went Democratic and 17 went Republican. The district's archetype — "Tossup" — captures the overall trajectory of that voting record.

Wisconsin 31st State Senate District delivered D+3 in 2024 — close enough to flip again next time.

Key facts

Demographics

Compare two places, side by side

Frequently asked questions