LaSalle County

LaSalle County is an administrative division in Illinois situated across portions of the Fox Valley and Illinois River Valley. The city of Ottawa serves as its administrative center and is located in the heart of this region.

The county was established in 1831 and named after a French explorer who had traveled through Illinois territories. The 1800s brought major political moments that drew national attention to the region.

The county's name honors a French explorer who traveled through the region and shaped its early story. This heritage remains visible in how locals speak about their land and the stories passed down through generations.

The area offers a mix of rural settings and small urban centers easily explored by car. Visitors will find agricultural landscapes, local businesses, and access to river valleys.

A grand mansion from the mid-1800s displays architectural features from that era and stands as evidence of affluent life before the Civil War. This building is remarkable for its size and the attention to detail in its construction.

Location: Illinois

Inception: January 15, 1831

Capital city: Ottawa

Elevation above the sea: 147 m

Shares border with: Lee County, DeKalb County, Kendall County, Grundy County, Livingston County, Woodford County, Marshall County, Putnam County, Bureau County

Website: https://lasallecounty.org

GPS coordinates: 41.34399,-88.88595

Latest update: December 6, 2025 22:06