Waterloo, IL Demographics
Waterloo, IL is the 207th most populous of 1464 cities in Illinois, with 11,013 residents across 8 square miles. That is about 1,346 people per square mile.
At the 2020 census
| Population | 11,013 |
|---|---|
| Land area | 8 sq mi |
| Density | 1,346 / sq mi |
Data: 2020 Decennial Census · land area from Census TIGER/Line
How Waterloo, IL compares to the US
We're computing this city's comparison table. Check back shortly. Population, land area, and density above are already exact.
Related places
Other cities nearby
Nearest cities
About this page
City statistics cover the municipal boundary only, not the wider metro area.
Figures come from the 2020 census and the American Community Survey, compared against national averages.