Waterloo, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Waterloo, Iowa is 66,947 as of the 2023 American Community Survey, making it the 8th-largest city in Iowa. The median household income is $56,344, the median home value is $150,200, and the median age is 36.6.
The population has declined 1.5% since 2010 (68,492 → 67,477).
66,947
Population
1087
People / sq mi
$56,344
Median Income
$150,200
Median Home Value
Waterloo covers 61.6 sq mi of land at 1087 people per square mile.
About Waterloo, IA
Waterloo is a city in Iowa with a population of 66,947. It ranks #8 among cities in Iowa by population. The median age is 36.6, younger than the national median. The population is 49.3% male and 50.7% female.
The median household income in Waterloo is $56,344, below the US median of $74,580. 11.5% of residents live below the federal poverty level. Home values sit at a median of $150,200, with monthly rent averaging $896. The homeownership rate of 61.1% is lower than the national rate of 64.8%.
Educational attainment in Waterloo reflects 22.6% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 7.1% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 16.2 minutes each way.
Waterloo city Population History (2010-2024)
The city of Waterloo city had a population of 68,492 in 2010 and 67,477 in 2024, a -1.5% growth over 14 years. The peak was 68,700 in 2013. Average annual growth rate: -0.11%.
67,477
Population (2024)
68,492
Population (2010)
68,700
Peak (2013)
-0.11%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 68,492 |
| 2011 | 68,554 |
| 2012 | 68,535 |
| 2013 | 68,700 |
| 2014 | 68,676 |
| 2015 | 68,619 |
| 2016 | 68,108 |
| 2017 | 67,758 |
| 2018 | 67,722 |
| 2019 | 67,328 |
| 2020 | 67,266 |
| 2021 | 66,895 |
| 2022 | 66,530 |
| 2023 | 66,856 |
| 2024 | 67,477 |
Race & Ethnicity
| White | 69.1% |
| Black or African American | 17.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.5% |
| Two or More Races | 0.0% |
Economy & Income
$56,344
Median Household Income
$33,372
Per Capita Income
11.5%
Poverty Rate
4.2%
Unemployment Rate
Housing
$150,200
Median Home Value
$896
Median Rent
61.1%
Owner-Occupied
Education
90.6%
High School+
22.6%
Bachelor's+
Commute
0.4%
Drive Alone
77.8%
Public Transit
7.1%
Work From Home
16.2 min
Avg Commute
Community Profile
18.9%
Foreign Born
86.3%
Non-English at Home
6.2%
Veterans
15.7%
With Disability
94.4%
Health Insurance
93.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 20.9% |
| Manufacturing | 20.2% |
| Education, Health Care & Social Services | 10.0% |
| Finance, Insurance & Real Estate | 7.7% |
| Information | 6.2% |
| Retail Trade | 5.6% |
| Construction | 5.6% |
| Arts, Entertainment & Food Services | 3.8% |
| Public Administration | 2.6% |
| Transportation & Warehousing | 1.4% |
| Agriculture & Mining | 0.4% |
Largest cities in Iowa
Largest counties in Iowa
Part of Iowa
Metro areas in Iowa
City rankings
Frequently Asked Questions
Waterloo, Iowa has a population of 66,947 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 8th-largest city in Iowa.
The median household income in Waterloo, Iowa is $56,344, with 11.5% of residents living below the federal poverty level.
The median home value in Waterloo, Iowa is $150,200, with median monthly rent at $896 and a homeownership rate of 61.1%.
The median age in Waterloo, Iowa is 36.6 years. The population is 49.3% male and 50.7% female.
The population has declined 1.5% since 2010 (68,492 → 67,477).
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Statewide data for Iowa
Population, race, income, age, and trends across Iowa
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.