LaSalle County Map, Illinois

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LaSalle County, Illinois

LaSalle County is a big stretch of land in north-central Illinois, where the Illinois River cuts through. Ottawa is the county seat, but Peru and LaSalle are in the mix too in terms of population. Starved Rock State Park brings in tons of hikers.

It’s old coal country, trying to find its footing these days. You’ve got a weird mix of industry and farmland here. Corn and soybeans are for miles, broken up by the occasional wind farm.

You’ll find some great old bars along the river, the kind of places that haven’t changed in 50 years. Buffalo Rock State Park is also nice if you want to avoid the Starved Rock crowds. On a good day, you can spot bald eagles soaring over the river.

Category	Details
County Name	LaSalle County
County Seat	Ottawa
Population	Approximately 100,000
Cities, Towns, and Communities	Ottawa, Streator, Peru, LaSalle, Mendota, Marseilles, Oglesby, Tonica, Seneca, and various other communities.
Interstates and Highways	Interstate 39, Interstate 80, U.S. Highway 6, U.S. Highway 34, Illinois Route 23, Illinois Route 71
FIPS Code	17-099
Total Area (Land and Water)	1,154 square miles (land: 1,141 sq mi, water: 13 sq mi)
Adjacent Counties (and Direction)	Lee County (Northwest), DeKalb County (North), Kendall County (Northeast), Grundy County (East), Livingston County (Southeast), Woodford County (South), Marshall County (Southwest), Putnam County (West), Bureau County (West)
Time Zone	Central Time Zone (CT)
State	Illinois
Coordinates	41.3500° N, 88.8500° W
Etymology	Named after Sieur de la Salle, French explorer of the Great Lakes
Major Landmarks	Starved Rock State Park, Matthiessen State Park, Illinois and Michigan Canal National Heritage Corridor, LaSalle County Historical Society, Ottawa Historical and Scouting Museum
Website	LaSalle County Website