Cook County Building – Chicago, IL

The Cook County Building

Seat of County Government

The Cook County Building, located at 118 North Clark Street, is the central headquarters for the government of Cook County, Illinois-the second-most populous county in the United States. This massive neoclassical structure, which shares a city block with Chicago City Hall, serves as the nerve center for county administration, legislation, and essential public records. It houses the offices of the Cook County Board of Commissioners, the County Board President, and other key elected officials who oversee the county’s vast health, safety, and judicial systems.

Vital Records and Tax Services

For residents, the Cook County Building is the primary destination for handling critical personal and property business. Key departments located here include:

• Cook County Clerk (Vital Records): The place to obtain certified copies of birth, death, and marriage certificates. The Clerk’s office also manages voter registration and election administration.
• Cook County Treasurer: Responsible for the collection of property taxes. Property owners often visit to make payments, inquire about exemptions, or resolve tax disputes.
• Recorder of Deeds (now merged with Clerk): Maintenance of land records and real estate documents.
• Assessor’s Office: Evaluation of property values for tax purposes.

Security and Access

As a high-profile government facility, security at the 118 North Clark Street entrance is strict and mandatory. All visitors must pass through metal detectors and have their bags x-rayed by the Cook County Sheriff’s deputies. Lines can be long, especially during tax season or near election deadlines. Visitors are advised to leave unnecessary bags, sharp objects, and weapons at home to expedite entry. While the building is physically connected to City Hall, they are distinct entities; ensure you are looking for “County” offices rather than “City” departments to avoid confusion.

Transit and Location

Located in the heart of the Chicago Loop, the building is exceptionally well-connected to public transit. It is directly accessible via the Clark/Lake “L” station and numerous bus lines. Public parking in the immediate vicinity is extremely limited and expensive; using the CTA or Metra is strongly recommended.