Illinois

Parcel data for Illinois state: downloads, search portals, and interactive maps

Illinois State

Illinois parcel data organized by county

Organized alphabetically or use the dropdown to jump to a specific county

Cook County, IL

Cook County is located in northeastern Illinois and covers 1,635 mi². Created by the Illinois State Legislature on January 15, 1831, it was the 54th county established in Illinois. It is the second most populous county in the United States and the largest in Illinois - with a population of 5,180,493. The county seat is located in Chicago.

DuPage County, IL

DuPage County is located in northeastern Illinois, covering 336 mi². With a population of 929,589, it is the second most populous county in the state. The county seat is located in Wheaton. Known as one of Chicago’s most conservative suburbs, Wheaton is home to more than 45 churches and 30 additional places of worship. DuPage county was established in 1839.

Kane County, IL

Kane County is the fifth most populous county in the state with a 2018 population of 534,216. It is located in northeastern Illinois and covers 524 mi². The county seat is located in Geneva, which is known as the home of the Fabyan Windmill - an authentic, working Dutch windmill from the 1850’s. Established on January 16, 1836, the population is currently 534,216.

Lake County, IL

Lake County is located in northeastern Illinois along the shores of Lake Michigan. It encompasses 1,368 mi² and is the third most populous county in the state. Established on March 1, 1839 the county seat is located in Waukegan, which is known as one of the oldest communities in Illinois. As of the 2018 census, the population was 700,832.

Will County, IL

Will County is located in northeastern Illinois and encompasses 849 mi of land. The county seat is Joliet, which was once known for its limestone as “Stone City”. Will County is the fourth most populous county in Illinois - with a population of 692,310. Established on January 12, 1836, the area experiences on average 39 inches of rain, and 28 inches of snow per year.