† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupWaterlooWisconsinUnited States
German45.8%35.8%12.5%
Irish11.0%10.4%9.4%
Polish6.7%7.6%2.2%
Norwegian6.2%6.1%—
English5.8%6.7%9.5%
American3.7%3.4%5.3%
Italian3.1%2.7%4.8%
French2.4%2.2%1.6%
Mexican12.3%5.4%11.3%
Puerto Rican1.5%1.1%1.8%
Cuban0.6%—0.7%
Nicaraguan0.6%——
Honduran0.4%—0.3%
Spaniard0.4%——
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Waterloo
Wisconsin
United States
Median age
37.8
40.5
39.1
Age 18–24
7.3%
9.3%
9.2%
Age 65 and older
16.5%
18.5%
17.2%
Household economy
Measure
Waterloo
Wisconsin
United States
Median household income
$87,776
$77,485
$84,427
Poverty rate
13.7%
10.6%
12.5%
Bachelor's degree or higher (25+)
23.9%
33.5%
35.6%
Languages at home
Measure
Waterloo
Wisconsin
United States
Speaks a non-English language at home
13.7%
9.1%
22.3%
Spanish
13.5%
5.0%
13.6%
Religious landscape
Measure
Waterloo
Wisconsin
United States
Catholic
—
21.0%
18.6%
Evangelical Protestant
—
14.5%
16.5%
Unclaimed / not counted
—
52.0%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Waterloo, Wisconsin
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+9.0%
2008
+23.8%
2012
+14.2%
2016
−4.3%
2020
−4.2%
2024
−2.4%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
48.4%Harris947
50.8%Trump993
0.8%
R+2.4
D+1.8
R+0.9
1,955
R
47.0%Biden860
51.2%Trump936
1.8%
R+4.2
D+0.2
R+8.6
1,828
R
43.9%Clinton712
48.2%Trump782
7.8%
R+4.3
R+18.6
R+6.4
1,621
D
56.4%Obama931
42.2%Romney696
1.4%
D+14.2
R+9.5
D+10.4
1,650
D
61.3%Obama963
37.5%McCain589
1.3%
D+23.8
D+14.8
D+16.5
1,572
D
53.9%Kerry805
44.9%Bush671
1.1%
D+9.0
—
D+11.4
1,493
Waterloo sits in Dodge County, a reliably Republican-leaning exurban corridor stretching between Madison and Milwaukee. At roughly 3,600 residents, local turnout swings can outweigh precinct-level party registration shifts in close statewide contests.
Across the recorded series it reached a Democratic high of 23.8 points in 2008 and a Republican high of 4.3 points in 2016. Between 2020 and 2024 the city moved 1.8 points toward the Democratic candidate; the 2024 margin was 2.4 points.
A population of 3,600, a 79% non-Hispanic-white share, and a median household income of $87,776 describe the city.
In 2024, Waterloo, Wisconsin voted Republican by 2.4 points (R+2.4), carried by the Republican candidate. Out of 1,955 votes cast, 947 went Democratic and 993 went Republican.
When did Waterloo, Wisconsin last vote Democratic?
The most recent presidential election in which Waterloo, Wisconsin voted Democratic was 2012.
How many people live in Waterloo, Wisconsin?
Waterloo, Wisconsin has a population of 3,600 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Waterloo, Wisconsin?
Median household income in Waterloo, Wisconsin is $87,776 — above the national median of $80,734. The Wisconsin state median is $77,485.
What is the political history of Waterloo, Wisconsin?
Akashic tracks 6 presidential elections in Waterloo, Wisconsin from 2004 to 2024. Of those, 3 went Democratic and 3 went Republican.
