Waterloo Flag

Waterloo

County Seat:
No
Area (mi²):
3.794
State:
Wisconsin

Waterloo is a city located in Jefferson County, Wisconsin. Waterloo has a 2026 population of 3,668. Waterloo is currently growing at a rate of 0.8% annually and its population has increased by 4.92% since the most recent census, which recorded a population of 3,496 in 2020.

The median household income in Waterloo is $87,776 with a poverty rate of 13.65%. The median age in Waterloo is 37.8 years: 34 years for males, and 41.6 years for females. For every 100 females there are 104.2 males.

3.7K
Total Population
967
Density (mi²)
29 0.8%
Growth

Waterloo Population

Waterloo Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20263,668290.8%
20253,639280.78%
20243,611-2-0.06%
20233,613-8-0.22%
20223,621-35-0.96%
20213,6561604.58%
20203,49600%
20193,337-19-0.57%
20183,356140.42%
20173,34210.03%
20163,341-8-0.24%
20153,349-4-0.12%
20143,353-8-0.24%
20133,36120.06%
20123,359160.48%
20113,34340.12%
20103,33960.18%
20003,25954720.17%
19902,71200%

Median Age

Overall: 37.8 years
Female: 41.6 years
Male: 34 years

Waterloo Adults

There are 2,833 adults, (598 of whom are seniors) in Waterloo.

Sex Ratio

Female: 1,763 (49%)
Male: 1,837 (51%)

Demographics

The racial composition of Waterloo includes 86.53% White, and smaller percentages for Native Hawaiian or Pacific Islander, other race, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White3,11586.53%
Two or more races40811.33%
Native Hawaiian or Pacific Islander491.36%
Other race170.47%
Asian110.31%
Race
Population ↓
Percentage (of total)
Two or more races39611%
White1133.14%
Native Hawaiian or Pacific Islander491.36%
Other race170.47%
Asian110.31%
Race
Population ↓
Percentage (of total)
White3,00283.39%
Two or more races120.33%

Waterloo Marital Status

Economics and Income Statistics

Waterloo 's average per capita income is $52,667. Household income levels show a median of $87,776. The poverty rate stands at 13.65%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$105,804-
Families$93,942$82,755
Households$87,776$85,116
Non Families$68,958$77,801

$52,667

Average Income

$87,776

Median Household Income

13.65%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)