Cook County contains 134 municipalities in its region, the most well known being the City of Chicago – which is the County seat where the central offices of Cook County are located.

Cook County was created on January 15, 1831 by an act of the Illinois State Legislature as the 54th county established in Illinois. The unincorporated Fort Dearborn settlement at the mouth of the …

Nov 7, 2025 · The Cook County Property Tax Portal is the result of collaboration among the elected officials who take part in the property tax system; the Portal consolidates information and delivers …

Cook County contains 134 municipalities in its region, the most well known being the City of Chicago – which is the County seat where the central offices of Cook County are located.

Cook County contains 134 municipalities in its region, the most well known being the City of Chicago – which is the County seat where the central offices of Cook County are located.

Our Service Listing has information on the County services you need help with and contact information is provided with each service so you can reach the office that can help you further.

The Cook County Sheriff offers an online inmate locator service. Click below to go to the Sheriff's website and locate a detainee in Cook County Jail.

The Clerk of the Circuit Court serves the citizens of Cook County and the participants in the judicial system in an efficient, effective and ethical manner. All services, information and court records are …

The Cook County Clerk's office keeps official records of births that occur in Chicago and suburban Cook County. Please click below to be redirected to the Clerk's page on birth certificates.

Important: This site provides access to the Cook County Assessor’s Office property records database. To access the records, you can search by your Property Index Number (PIN) or by Address.