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LaSalle County, Illinois
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LaSalle County, Illinois Map
An detailed map of LaSalle County. Click on a nearby County to view more information about that County.
Map of Townships in LaSalle County, Illinois
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Map of Counties in Illinois
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About LaSalle County, Illinois
LaSalle County is located within the Fox Valley and Illinois River Valley regions of the U.S. state of Illinois. As of the 2020 Census, it had a population of 109,658. Its county seat and largest city is Ottawa. LaSalle County is part of the Ottawa, IL Micropolitan Statistical Area of Northern Illinois.
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