LaSalle County, Illinois
LaSalle County is a county in Illinois with an estimated population of 108,309 in 2023. 20 cities, towns and Census places in it are indexed here.
Largest places in LaSalle County
Ottawa 18,752Streator 12,269Peru 9,780LaSalle 9,432Mendota 6,929Marseilles 4,773Oglesby 3,639Sheridan 2,418Seneca 2,311Earlville 1,597North Utica 1,332Leland 930Tonica 735Millington 621Grand Ridge 510Lostant 432Naplate 413Ransom 307Cedar Point 262Rutland 255
About LaSalle County
LaSalle County is one of the counties of Illinois. County governments in Illinois handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.