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Ottawa, IL

View of Ottawa, IL
Image credit: IvoShandor / CC BY-SA 3.0
Population
18,684
U.S. Census Population Estimates Program · 2025
Elevation
483 ft
Median Home Value
$154,000
U.S. Census American Community Survey 5-Year · 2024
Median Rent
$920/mo
U.S. Census American Community Survey 5-Year · 2024
Median Income
$71,413
U.S. Census American Community Survey 5-Year · 2024

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Ottawa in context.

OverallBest places in IllinoisPopulation rankingHighest population places in IllinoisNearest larger communityOswego, Illinois34 miles away · 39,948 residents.

About Ottawa

Ottawa is a city and the county seat of LaSalle County, Illinois, situated at the scenic confluence of the Fox and Illinois rivers. Long serving as a historic portage trail connecting Lake Michigan to the Mississippi River, the city of approximately 18,450 is known today as the eastern gateway to Starved Rock State Park. The community features a historic downtown district and public education is administered by the Ottawa Elementary and High School districts.

Top Rating Signals

Highest current ratings for this town.

Lower County Wildfire Hazard Potential ClassA+100.0ratingLower Projected Late-Century County-Area Exposure to Sea-Level RiseA+100.0ratingOutskirts FitA+99.7rating

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