Waterloo Flag

Waterloo

County Seat:
Yes
Area (mi²):
61.595
State:
Iowa

Waterloo is a city located in Black Hawk County, Iowa. Waterloo has a 2025 population of 66,160. It is also the county seat of Black Hawk County. Waterloo is currently declining at a rate of -0.34% annually and its population has decreased by -1.66% since the most recent census, which recorded a population of 67,275 in 2020.

The average household income in Waterloo is $76,562 with a poverty rate of 16.4%.The median age in Waterloo is 36.6 years: 36 years for males, and 37.3 years for females.

66.2K
Total Population
1,074
Density (mi²)
-223 -0.34%
Growth

Waterloo Population

Waterloo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Waterloo includes 69.13% White, 17.19% Black or African American, 3.63% other race, and smaller percentages for Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White46,28069.13%
Black or African American11,50817.19%
Two or more races3,8185.7%
Other race2,4293.63%
Asian1,7582.63%
Native Hawaiian or Pacific Islander7061.05%
Native American4480.67%

Waterloo Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Waterloo's average per capita income is $42,506. Household income levels show a median of $56,344. The poverty rate stands at 16.4%.

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$88,848-
Families$73,224$93,941
Households$56,344$76,562
Non Families$39,997$50,852

$42,506

Average Income

$56,344

Median Household Income

16.4%

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)