Waterloo, Iowa Population 2021

66,540
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Waterloo is a city located in Black Hawk County Iowa. It is also the county seat of Black Hawk County. With a 2020 population of 66,540, it is the 9th largest city in Iowa and the 574th largest city in the United States . Waterloo is currently declining at a rate of -0.59% annually and its population has decreased by -2.73% since the most recent census, which recorded a population of 68,406 in 2010. Waterloo reached it's highest population of in . Spanning over 63 miles, Waterloo has a population density of 1,084 people per square mile.

The average household income in Waterloo is $64,514 with a poverty rate of 17.42%. The median rental costs in recent years comes to $765 per month, and the median house value is $117,400. The median age in Waterloo is 36.8 years, 34.9 years for males, and 38.4 years for females.

Waterloo Demographics

According to the most recent ACS, the racial composition of Waterloowas:

  • White: 74.64%
  • Black or African American: 16.69%
  • Two or more races: 3.07%
  • Other race: 2.39%
  • Asian: 2.19%
  • Native American: 0.59%
  • Native Hawaiian or Pacific Islander: 0.42%
The current population of Waterloo, Iowa is 66,540 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 67,328.The last official US Census in 2010 recorded the population at 68,406.

Waterloo, Iowa Population 2021

2020 and 2021 population is estimated by projecting the 2019 numbers.

Year Population Growth Growth Rate
2021167,694-414-0.25%
2020168,108-414-0.25%
2019168,522-414-0.25%
2018168,936-423-0.25%
2017169,359-751-0.44%
2016170,110-742-0.44%
2015170,8524020.24%
2014170,4505970.35%
2013169,8531,0420.61%
2012168,8113680.22%
2011168,4435230.31%
2010167,9200.00%

Waterloo Metro Area Population by Year

Population by Race

Race Population Percentage
White50,69274.64%
Black or African American11,33616.69%
Two or More Races2,0863.07%
Some Other Race1,6262.39%
Asian1,4882.19%
American Indian and Alaska Native4020.59%
Native Hawaiian and Other Pacific Islander2820.42%
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Waterloo Population by Race

Waterloo Population Pyramid $2021

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Waterloo Median Age

36.8


Total

34.9


Male

38.4


Female

Waterloo Adults

There are 52,377 adults, (10,897 of whom are seniors) in Waterloo.

Waterloo Age Dependency

63.7

Age Dependency Ratio

26.3

Old Age Dependency Ratio

37.5

Child Dependency Ratio

Waterloo Sex Ratio

Female

33,879

49.89%

Male

34,033

50.11%

Waterloo Population by Age

Waterloo Renter vs Owner Occupied by Household Type

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Waterloo Household Types

Type Owner Renter
Female41.8%58.2%
Male46.4%53.6%
Non Family49.2%50.8%
All60.9%39.1%
Married80.9%19.1%

60.9%

Rate of Home Ownership

Waterloo Households and Families

Type Count Average Size Owned
All28,3112.3760.9
Non Family11,5911.2249.2
Married11,3993.0980.9
Female3,6863.3141.8
Male1,6353.2646.4

3.03

Average Family Size

2.37

Average Household Size

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Waterloo Households by Type

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Education Attained Count Percentage
Less Than 9th Grade2,1264.68%
9th to 12th Grade3,1496.94%
High School Graduate15,29633.70%
Some College9,71521.41%
Associates Degree4,4849.88%
Bachelors Degree7,42816.37%
Graduate Degree3,1887.02%
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Waterloo Educational Attainment by Sex (over 25)

Waterloo Educational Attainment by Race

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Race Total High School Bachelors
White35,31332,2788,910
Black6,3945,3301,015
Hispanic2,0891,385378
Other Race83245983
Asian785442164
2+ Races525467119
Native American1951456
Islander14011136

The highest rate of high school graduation is among white people with a rate of 91.41%.

The highest rate of bachelors degrees is among islander people with a rate of 25.71%.

Waterloo Educational Attainment by Race

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Name Average Male Female
Overall$34,028$38,510$29,791
Less Than 9th Grade$28,240$30,195$24,107
High School Graduate$30,447$35,766$24,706
Some College$31,110$37,429$27,185
Bachelors Degree$43,159$48,229$39,443
Graduate Degree$66,164$78,203$61,875

$34,028

Average Earnings

$38,510

Average Male

$29,791

Average Female

Waterloo Earnings by Educational Attainment

Waterloo Language by Age

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Waterloo Language

87.16% of Waterloo residents speak only English, while 12.84% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 5.60% of the population.

Waterloo Language

Waterloo Poverty by Race

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Name Total In Poverty Poverty Rate
White47,4885,83912.30%
Black11,1723,75133.58%
Hispanic4,6491,36129.28%
Multiple2,01144322.03%
Other1,62635321.71%
Asian1,48619813.32%
Islander28212544.33%
Native3926516.58%

17.42%

Overall Poverty Rate

15.50%

Male Poverty Rate

19.34%

Female Poverty Rate

Poverty in Waterloo

The race most likely to be in poverty in Waterloo is Islander, with 44.33% below the poverty level.

The race least likely to be in poverty in Waterloo is White, with 12.30% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.05%. Among those working part-time, it was 20.42%, and for those that did not work, the poverty rate was 26.53%.

Waterloo Poverty

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Name Poverty
Less Than 9th Grade28.80%
High School13.52%
Some College12.71%
Bachelors or Greater5.37%

Waterloo Poverty Rate by Education

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Rate Poverty
Female Unemployed55.91%
Male Unemployed31.84%
Female Employed10.08%
Male Employed6.92%

Waterloo Poverty Rate by Employment Status and Sex

Waterloo Income by Household Type

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Name Median Mean
Households$47,327$64,514
Families$59,567$77,680
Married Families$77,708$94,358
Non Families$30,394$41,519
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Income by Household Type

Waterloo Marital Status

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Marriage Rates

43.9%

Overall Marriage Rate

43.6%

Male Marriage Rate

44.2%

Female Marriage Rate

Waterloo Married by Age and Sex

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Waterloo Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Waterloo Marital Status by Race

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Waterloo Marital Status

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4,123

Number of Veterans

3,784

Male Veterans

339

Female Veterans

War Veterans
Vietnam1,584
First Gulf War568
Second Gulf War554
Korea368
World War II245

Waterloo Veterans by War

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Age Group Veterans
65 to 741,224
75+1,070
55 to 64761
35 to 54699
18 to 34369

Waterloo Veterans by Age

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Name Veterans % of Total
White3,5368.55%
Black4665.94%
Hispanic823.03%
2+ Races548.48%
Other Race292.67%
Islander2818.18%
Asian60.59%
Native American41.69%

Waterloo Veterans by Race

Waterloo Veterans by Education

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10.40%

Veteran Poverty Rate

29.70%

Veteran Disability Rate

Waterloo Veterans by Education

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65.5%

Labor Force Participation

61.7%

Employment Rate

5.7%

Unemployment Rate

Waterloo Employment by Age

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Waterloo Employment by Race

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Waterloo Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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71.02%

Born in Waterloo

90.81%

Native Born

9.19%

Foreign Born

5.46%

Non Citizen

3.74%

Naturalized

Place of Birth

90.81% of Waterloo residents were born in the United States, with 71.02% having been born in Iowa. 5.46% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Waterloo Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202166,540-394-0.59%
202066,934-394-0.59%
201967,328-394-0.58%
201867,722-36-0.05%
201767,758-350-0.51%
201668,108-511-0.74%
201568,619-57-0.08%
201468,676-24-0.03%
201368,7001650.24%
201268,535-19-0.03%
201168,554620.09%
201068,492-255-0.04%
200068,7472,2800.34%
199066,467-9,518-1.33%
198075,9854520.06%
197075,5333,7780.51%
196071,7556,5570.96%
195065,19813,4552.34%
194051,7435,5521.14%
193046,1919,9612.46%
192036,2309,5373.10%
191026,69314,1137.81%
190012,5805,9066.54%
18906,6741,0441.72%
18805,6301,2932.64%
18704,3370.00%

Waterloo Population by Year