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 2026 population of 67,582. It is also the county seat of Black Hawk County. Waterloo is currently growing at a rate of 0.08% annually and its population has increased by 0.47% since the most recent census, which recorded a population of 67,266 in 2020.

The median household income in Waterloo is $57,480 with a poverty rate of 16.57%. The median age in Waterloo is 36.7 years: 36.4 years for males, and 37.2 years for females. For every 100 females there are 96.1 males.

67.6K
Total Population
1,097
Density (mi²)
53 0.08%
Growth

Waterloo Population

Waterloo Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202667,582530.08%
202567,529520.08%
202467,4776210.93%
202366,8563260.49%
202266,530-365-0.55%
202166,895-371-0.55%
202067,266-43-0.06%
201967,401-312-0.46%
201867,713-60-0.09%
201767,773-366-0.54%
201668,139-506-0.74%
201568,645-48-0.07%
201468,693-19-0.03%
201368,7121700.25%
201268,542-12-0.02%
201168,554660.1%
201068,488820.12%
200068,7472,2803.43%
199066,467-9,518-12.53%
198075,9854520.6%
197075,5333,7785.27%
196071,7556,55710.06%
195065,19813,45526%
194051,7435,55212.02%
193046,1919,96127.49%
192036,2309,53735.73%
191026,69314,113112.19%
190012,5805,90688.49%
18906,6741,04418.54%
18805,6301,29329.81%
18704,33700%

Median Age

Overall: 36.7 years
Female: 37.2 years
Male: 36.4 years

Waterloo Adults

There are 50,599 adults, (11,387 of whom are seniors) in Waterloo.

Sex Ratio

Female: 34,173 (51%)
Male: 32,835 (49%)

Demographics

The racial composition of Waterloo includes 67.35% White, 16.61% Black or African American, 4.29% other race, 3.17% Asian, and smaller percentages for Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White45,13367.35%
Black or African American11,13016.61%
Two or more races4,4986.71%
Other race2,8724.29%
Asian2,1253.17%
Native Hawaiian or Pacific Islander9641.44%
Native American2860.43%
Race
Population ↓
Percentage (of total)
Other race2,7924.17%
White1,2531.87%
Two or more races1,2391.85%
Native American2060.31%
Black or African American1260.19%
Race
Population ↓
Percentage (of total)
White43,88065.48%
Black or African American11,00416.42%
Two or more races3,2594.86%
Asian2,1253.17%
Native Hawaiian or Pacific Islander9641.44%
Other race800.12%
Native American800.12%

Waterloo Marital Status

Economics and Income Statistics

Waterloo 's average per capita income is $43,322. Household income levels show a median of $57,480. The poverty rate stands at 16.57%.

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$87,489-
Families$72,697$90,280
Households$57,480$74,903
Non Families$41,832$52,191

$43,322

Average Income

$57,480

Median Household Income

16.57%

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)