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Cook County

Cook County is located in northeast Illinois.  The County Seat is Chicago and the largest city is Chicago.  The Official Web Site is located at  The 2014 population estimate is 5,246,456 and the 2010 census population was 5,195,060.  The land area is 945.33 square miles and there are 5495.1 persons per square mile.

65.9% of the population is White, 24.6% is Black or African American, 24.7% is Hispanic or Latino, 6.9% is Asian, 0.8% is American Indian or Alaska Native, 0.1% is Native Hawaiian or Pacific Islander, and 1.8% is two or more races.  84.5% have a high school degree or higher, and 34.7% have a Bachelor degree or higher.

The median home value is $231,200, there are 1,933,335 households, an average of 2.65 persons per household.  The per capita income is $30,183,  the median household income is $54,548, and 16.9% of the persons in Cook County are considered below poverty level.

The total number of firms, at last estimate, was 510,931.  Retail sales (in $1000) were $60,585,557, and sales per capita were $11,571.  The percentage of black-owned firms is 16.4%, and the percentage of women-owned firms is 32.3%.

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Public Records


Cook County agency directory.

Birth Certificates 1878-1922

Search over 1.4 million images of Cook County birth certificates recorded between 1878 and 1922 and view or download images.

Birth Records 1871-1915

Search Cook County (Chicago) birth records 1871 through 1915 and view or download images.

Births, Deaths, Marriages - Archives

Use this site to search for Cook County birth certificates 75 years or older, marriage licenses 50 years or older, and death certificates 20 years or older. Search by name, year or file number.

Coroner Inquest Records 1872-1911

Cook County coroner inquest records by name of deceased. Gives date of death, date filed, and book/page number. Site also includes information on ordering a copy of the record.

Court - Case Snapshots

Search the Cook County Clerk of Court for Case Snapshots for Civil, Domestic Relations and Law divisions by division name, case number, plaintiff/defendant name, and/or filing date.

Court - Probate Dockets

Search the Cook County Clerk of the Circuit Court probate dockets.

Court - Probate Wills

Search the Cook County Clerk of the Circuit Court probate wills dockets.

Court Black Line Trial Call Pool

Cook County Clerk of Court Black Line Pool cases. Search by case number, plaintiff or defendant name, or by attorney code.

Court Call Dockets

Cook County Clerk of Court Civil and Law Division Court Call of dockets for today and the next three business days.

Court Case Dockets

Search Cook County, Illinois Clerk of Circuit Court Civil, Law, Chancery, and Domestic Relations records for full case dockets.

Death Records 1878-1922

Search over 1.4 million images Cook County deaths recorded between 1878 and 1922 and view or download images of death certificates.

Deeds, Mortgages, Recorded Documents

Recorder of Deeds index of mortgages, deeds, affidavits, etc. by grantor/grantee, document number, legal description, PIN number, trust number, or subdivision.

Estate Search (Heirs)

Search the Cook County Treasurer's Office by name or case file number for the estates of heirs.


Find Sheriff's Office inmate records by jail number or name.

Marriage Records 1871-1920

Search Cook County (Chicago) marriage records filed between 1871 and 1920.

Marriages 1763-1900

Select Cook in the county field to search the Illinois Marriage Index for Cook County Marriages for the period 1763-1900 by groom name and/or bride name.


Cook County Building and Zoning Department status check of your building permit and online payment.

Polling Places

Search the Cook County Election Department database by address to find your polling place.

Property - Tax Information

Search the Cook County Treasurer records for property tax information by PIN.

Property - Tax Refunds

Search the Cook County Treasurer's Office for Duplicate and Overpayment Refund Information by PIN, name, and email address.

Property | Assessor

Cook County Assessor residential and non-residential property records, appeals, exemption, and neighborhood search.

Unclaimed Child Support Checks

Use this Cook County Clerk of the Circuit Court service to search for unclaimed child support checks that were returned by the US Postal Service.


Check your voter registration status in Suburban Cook County by last name, house number, street name, city, and zip.

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