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LaSalle County

county in Illinois, United States

Key facts

Country: United States
State: Illinois
Founded: January 15, 1831
Named after: René-Robert Cavelier, Sieur de La Salle
Seat: Ottawa
Largest city: Ottawa
Total: 1,148 sq mi (2,970 km )
Land: 1,135 sq mi (2,940 km )
Water: 13 sq mi (34 km ) 1.1%
Estimate 2025: 107,773
Density: 96.61/sq mi (37.30/km )
Time zone: UTC−6 ( Central )
Summer dst: UTC−5 ( CDT )
Congressional districts: 14th , 16th
Website: lasallecountyil .gov

via Wikipedia infobox

Article

LaSalle County is a county 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 (97 km) southwest of Chicago.