Waterloo is a city in Monroe County, Illinois, with a population of approximately 11,055.
Population11,055
Median Home$237,900
Area8.18 sq mi
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Meetings
All meetings →Recent News
All news →NewsFEB 19, 2026
Early morning crash east of Waterloo
Early morning crash east of Waterloo Republic-Times
Republic-TimesRead article ↗
NewsNOV 06, 2025
Charges filed in shooting outside Waterloo cinema
Charges filed in shooting outside Waterloo cinema Republic-Times
Republic-TimesRead article ↗
NewsAUG 14, 2025
Some vendors and performers in Waterloo Fourth event say they’re still waiting to be paid
Some vendors and performers in Waterloo Fourth event say they’re still waiting to be paid KMOV
KMOVRead article ↗
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Your Town at a Glance: The New Customizable Dashboard
The new Customizable Dashboard lets you pick from 20 widgets, drag to reorder, and save your layout. See exactly the civic data you care about — meetings, crime, finances, schools — at a glance.
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How to Compare Illinois Towns Before You Move
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