Cook County, Illinois Free Public Records Directory


Find Public Records in Cook County, Illinois

This page lists public record sources in Cook County, Illinois. Additional resources can be found on our Illinois State Public Records page, on city pages, and on topic pages using the navigation above.

Cook County, Illinois - General County Info
Cook County, Illinois Home Page

General information about Cook County

Population: 5,327,777
Area: 946 sq. miles
County Seat: Chicago
Area Code(s): 708 847 630 773 312
Time Zone: Central

Cook County, with an estimated population of 5,238,216, is the largest county in Illinois in population, and the second most populous county in the United States. Cook County’s population is larger than that of 28 U.S. states, with more than 40% of all residents in Illinois living in Cook County. The county is the sixth largest in Illinois by land area. It shares the state’s Lake Michigan shoreline with Lake County, and is also bordered by Will County; DuPage County; Kane County; McHenry County; Lake County, Indiana; and Berrien County, Michigan. Cook County was created out of Putnam County on January 15, 1831, by an act of the Illinois General Assembly. Cook County was named after Daniel Cook, one of the earliest and youngest statesmen in Illinois history. There are 135 incorporated municipalities, partially or wholly within Cook County, the largest of which is Chicago, the home to approximately 54% of the county’s population. That part of the county which lies outside the Chicago city limits is divided into 29 townships, which often divide or share governmental services with local municipalities. Chicago is the county seat, and largest city in both the state of Illinois and the Midwestern United States. The Chicago metropolitan area, often referred to as “Chicagoland,” has nearly 10 million people and is the third largest metropolitan area in the U.S. Chicago has one of the world’s largest, most diversified and balanced economies. It was the 2nd most visited city in the U.S. with 55 million visitors in 2017. In fact, Chicago’s O’Hare International Airport is one of the busiest airports in the world. Using the user-friendly links below, you can access a number of public records and documents including property tax records, birth records, death records, marriage records, court records, and other official records. [1][2]

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