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. LaSalle County borders Woodford, Marshall, Putnam, Bureau, Livingston, Lee, DeKalb, Kendall, and Grundy counties. Though LaSalle County is in the Chicago media market, it retains a unique identity with a mix of river towns and vast expanses of farmland. The county lies at the intersection of the Chicago, Peoria, Quad Cities and Rockford television markets with all four regions broadcasting within its borders and having a strong influence on the area, despite the county being only 60 miles southwest of Chicago.

Founded: January 15, 1831
Named for: René-Robert Cavelier, Sieur de La Salle
Seat: Ottawa
Largest city: Ottawa
Total: 1,148 sq mi (2,973.31 km²)
Land: 1,135 sq mi (2,939.64 km²)
Water: 13 sq mi (33.67 km²), 1.1
Time zone: Central: UTC-6-5
Official Website: https://lasallecounty.org/
Wikidata description: county in Illinois, United States
Wikidata id: Q487003
Wikidata label: LaSalle County
Wikidata aliases: Array
Source
Results from DuckDuckGo

Agency Contact Information