Town · Wisconsin
Town of Waterloo, Grant County, Wisconsin
Waterloo (town), Grant County, town, in Grant County, Wisconsin. Waterloo (town), Grant County had 570 residents on July 1, 2025 by the Census Bureau's estimate, up 2.5% since 2020; the 2020 Census counted 552 and the ACS 2020-2024 5-year estimates put it at 675 (±149). GEOID 5504383900.
Residents, July 2025 estimate
570
Census Bureau estimate (no margin published)
2020 Census count: 552 · ACS 2020-2024: 675 ±149
Median household income
$87,857
±$30,903 (90% margin)
Wisconsin: $77,485
Median home value
$309,100
±$67,400 (90% margin)
Wisconsin: $266,500
Median gross rent
$917
±$174 (90% margin)
Wisconsin: $1,087
Where is Waterloo (town), Grant County and what county is it in?
Waterloo (town), Grant County is a town in Grant County, Wisconsin. It covers 38.0 square miles of land, 15 residents per square mile in 2020.
Waterloo (town), Grant County is in the Platteville, WI micropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Waterloo (town), Grant County, and is it growing?
The Census Bureau estimates that 570 people lived in Waterloo (town), Grant County on July 1, 2025, up 2.5% since 2020, faster than Wisconsin (+1.3%). The 2020 Census counted 552 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 675 (±149).
| Measure | Waterloo (town), Grant County | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 675±149 | 51,770 | +181 |
| Households | 248±57 | 19,960 | no clear change |
| Average household size | 2.72±0.55 | 2.41 | no clear change |
| Housing units | 288±62 | 22,332 | no clear change |
Waterloo (town), Grant County's population since 2000
From 557 in 2000 to 570 in 2025: up 2.3%. The 2000, 2010 and 2020 figures are census counts, each for Waterloo (town), Grant County as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Waterloo (town), Grant County?
The median resident of Waterloo (town), Grant County is 53.8 years old; 22.4% are under 18 and 34.4% are 65 or older. The largest group is non-Hispanic white residents at 94.8%, then Hispanic or Latino residents (of any race) at 3.4%.
| Measure | Waterloo (town), Grant County | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 53.8±13.9 | 36.8 | no clear change |
| Under 18 years | 22.4%±5.9 pts | 21.1% | – |
| 65 years and over | 34.4%±12.5 pts | 18.5% | – |
| Male | 53.9%±7.4 pts | 51.9% | – |
| Hispanic or Latino (any race) | 3.4%±3.4 pts | 2.6% | – |
| White alone, not Hispanic | 94.8%±3.4 pts | 93.0% | no clear change |
| Black or African American alone, not Hispanic | 0.0%±3.3 pts | 1.5% | – |
| Asian alone, not Hispanic | 0.0%±3.3 pts | 0.7% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±3.3 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±3.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.3%±1.0 pts | 1.9% | – |
| Some other race alone, not Hispanic | 0.4%±0.6 pts | 0.2% | – |
| Born outside the United States | 0.6%±0.6 pts | 1.5% | – |
| Speak a language other than English at home (age 5+) | 2.7%±2.9 pts | 4.7% | – |
| Civilian veterans (age 18+) | 5.5%±3.8 pts | 5.9% | – |
| With a disability | 13.6%±5.4 pts | 11.3% | – |
| No health insurance coverage | 7.0%±8.1 pts | 8.0% | – |
| High school graduate or higher (age 25+) | 94.0%±3.0 pts | 93.5% | – |
| Bachelor's degree or higher (age 25+) | 14.7%±5.4 pts | 25.6% | no clear change |
| Graduate or professional degree (age 25+) | 6.0%±3.2 pts | 10.1% | – |
| Lived in the same house a year earlier | 96.9%±2.2 pts | 87.8% | – |
| Moved from another state in the past year | 0.6%±0.7 pts | 2.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Waterloo (town), Grant County earn?
Half of Waterloo (town), Grant County's 248 households earn less than $87,857 a year (±$30,903), against $66,858 in Grant County and $77,485 in Wisconsin. In 2015-2019 it was $71,662 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Waterloo (town), Grant County | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $87,857±$30,903 | $66,858 | no clear change |
| Mean household income | $95,946±$9,532 | $86,594 | – |
| Per capita income | $37,571±$4,696 | $34,411 | no clear change |
| People below the poverty line | 2.2%±1.8 pts | 13.0% | – |
| Children under 18 below the poverty line | 0.7%±1.7 pts | 14.4% | – |
| Households receiving SNAP | 7.3%±4.1 pts | 10.6% | – |
| Households with a computer | 93.1%±4.7 pts | 92.7% | – |
| Households with a broadband subscription | 87.9%±7.0 pts | 86.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Waterloo (town), Grant County?
Owners occupy 87.9% of Waterloo (town), Grant County's occupied homes and renters 12.1%. The median owner-occupied home is valued at $309,100 by its owner (±$67,400). The median renter pays $917 a month including utilities.
| Measure | Waterloo (town), Grant County | Grant County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $309,100±$67,400 | $200,700 | +$118,219 |
| Median gross rent | $917±$174 | $813 | +$313 |
| Renters paying 35% or more of income on rent | 18.5%±17.7 pts | 36.6% | – |
| Median monthly owner costs, with a mortgage | $2,179±$300 | $1,495 | – |
| Owner-occupied homes | 87.9%±5.6 pts | 69.8% | no clear change |
| Renter-occupied homes | 12.1%±5.6 pts | 30.2% | – |
| Housing units | 288±62 | 22,332 | no clear change |
| Homeowner vacancy rate | 0.0%±9.8 pts | 0.3% | – |
| Rental vacancy rate | 0.0%±45.1 pts | 5.7% | – |
| Single-family detached homes | 94.8%±3.0 pts | 75.1% | – |
| Mobile homes | 3.5%±2.3 pts | 4.9% | – |
| Built 2020 or later | 3.8%±3.6 pts | 1.2% | – |
| Built 2010 to 2019 | 10.1%±4.8 pts | 6.2% | – |
| Built 1939 or earlier | 29.5%±12.9 pts | 22.6% | – |
| Households with no vehicle | 3.6%±3.6 pts | 4.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Waterloo (town), Grant County building?
Builders took permits for 1 new housing units in Waterloo (town), Grant County in 2025 (1 in single-family houses), 1.8 per 1,000 residents against 4.3 across Wisconsin.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Waterloo (town), Grant County work and get to work?
48.9% of Waterloo (town), Grant County's workers drive alone and 38.9% work from home. The average trip to work takes 28.6 minutes.
| Measure | Waterloo (town), Grant County | Grant County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 61.6%±10.4 pts | 63.4% | – |
| Unemployment rate | 0.9%±1.1 pts | 3.1% | – |
| Drove alone to work | 48.9%±19.8 pts | 75.5% | – |
| Carpooled | 5.3%±3.7 pts | 5.5% | – |
| Public transportation | 0.0%±6.8 pts | 0.3% | – |
| Walked | 1.3%±1.5 pts | 6.4% | – |
| Worked from home | 38.9%±22.6 pts | 10.3% | +27.8 pts |
| Mean travel time to work | 28.6 min±2.8 | 21.1 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Waterloo (town), Grant County?
No census tract lies mostly in Waterloo (town), Grant County; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9605Grant County | 3,692 | $73,226 |
| Tract 9608Grant County | 2,954 | $78,542 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Waterloo (town), Grant County) · Census block assignment files
How does Waterloo (town), Grant County compare with other places in Wisconsin?
By the Census Bureau's July 2025 estimates, Waterloo (town), Grant County is the 9,643rd-most populous of the 16,079 U.S. towns and townships that have one and the 912th-most populous of 1,239 in Wisconsin.
Waterloo (town), Grant County is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 912th | 1,239 |
Waterloo (town), Grant County's figures with every place in Wisconsin (CSV)
Every place in Wisconsin, sortable · Compare Waterloo (town), Grant County with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Waterloo (town), Grant County?
23 of the 57 figures for Waterloo (town), Grant County on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Waterloo (town), Grant County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.