Waterloo, Illinois Population 2022

11,253
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Waterloo is a city located in Monroe County Illinois. It is also the county seat of Monroe County. With a 2020 population of 11,253, it is the 207th largest city in Illinois and the 3750th largest city in the United States. Waterloo is currently growing at a rate of 1.08% annually and its population has increased by 2.18% since the most recent census, which recorded a population of 11,013 in 2020. Spanning over 8 miles, Waterloo has a population density of 1,383 people per square mile.

The average household income in Waterloo is $80,986 with a poverty rate of 3.14%. The median rental costs in recent years comes to $766 per month, and the median house value is $204,400. The median age in Waterloo is 40.4 years, 41.2 years for males, and 39.7 years for females.

Waterloo Demographics

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

  • White: 96.89%
  • Asian: 1.56%
  • Other race: 0.45%
  • Two or more races: 0.45%
  • Black or African American: 0.39%
  • Native American: 0.25%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Waterloo, Illinois is 11,253 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 11,013.

Waterloo, Illinois Population 2022

Population by Race

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Waterloo Population by Race

Waterloo Population Pyramid 2022

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Waterloo Median Age

41.1


Total

40.4


Male

41.5


Female

Waterloo Adults

There are 8,301 adults, (2,195 of whom are seniors) in Waterloo.

Waterloo Age Dependency

Age Dependency Ratio

35.9

Old Age Dependency Ratio

34.7

Child Dependency Ratio

Waterloo Sex Ratio

Female

5,428

52.11%

Male

4,989

47.89%

Waterloo Population by Age

Waterloo Renter vs Owner Occupied by Household Type

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Waterloo Household Types

75.0%

Rate of Home Ownership

Waterloo Households and Families

2.85

Average Family Size

2.38

Average Household Size

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Waterloo Households by Type

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Waterloo Educational Attainment by Sex (over 25)

Waterloo Educational Attainment by Race

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The highest rate of high school graduation is among asian people with a rate of 100.00%.

The highest rate of bachelors degrees is among black people with a rate of 73.17%.

Waterloo Educational Attainment by Race

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$50,193

Average Earnings

$60,119

Average Male

$40,994

Average Female

Waterloo Earnings by Educational Attainment

Waterloo Language by Age

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Waterloo Language

96.94% of Waterloo residents speak only English, while 3.06% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.41% of the population.

Waterloo Language

Waterloo Poverty by Race

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3.14%

Overall Poverty Rate

2.81%

Male Poverty Rate

3.46%

Female Poverty Rate

Poverty in Waterloo

The race most likely to be in poverty in Waterloo is Black, with 4.55% below the poverty level.

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

The poverty rate among those that worked full-time for the past 12 months was 1.23%. Among those working part-time, it was 2.00%, and for those that did not work, the poverty rate was 8.33%.

Waterloo Poverty

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Waterloo Poverty Rate by Education

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Waterloo Poverty Rate by Employment Status and Sex

Waterloo Income by Household Type

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Income by Household Type

Waterloo Marital Status

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Marriage Rates

56.8%

Overall Marriage Rate

56.3%

Male Marriage Rate

57.2%

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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634

Number of Veterans

Male Veterans

Female Veterans

Waterloo Veterans by War

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Waterloo Veterans by Age

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Waterloo Veterans by Race

Waterloo Veterans by Education

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4.07%

Veteran Poverty Rate

14.63%

Veteran Disability Rate

Waterloo Veterans by Education

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63.7%

Labor Force Participation

61.5%

Employment Rate

3.5%

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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57.96%

Born in Waterloo

98.40%

Native Born

1.60%

Foreign Born

0.14%

Non Citizen

1.46%

Naturalized

Place of Birth

98.40% of Waterloo residents were born in the United States, with 57.96% having been born in Illinois. 0.14% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Waterloo Place of Birth

Note: 2021 and 2022 data is projected

Waterloo Population by Year