LaSalle County, county in Illinois, United States. As of 2020 county had an estimated population of 107,571 inhabitants. The county was created 191 years ago in 1831. Its county seat is "Ottawa".
There are 4 city/town in LaSalle County, IL. The largest city of LaSalle County is Streator with a population of 12,933. Other cities include, Sheridan population 2,515, Seneca population 2,179 and Serena population 1,088
Cities, Towns, Neighborhoods & Other Populated Places in LaSalle County.
|Seneca||Village in Illinois||LaSalle||2,179|
|Serena||Human settlement in Illinois, United States of America||LaSalle||1,088|
|Sheridan||Village in Illinois, United States||LaSalle||2,515|
|Streator||City in Illinois||LaSalle||12,933|