Run for office in Cook County, IL.

Offices with upcoming filing dates and elections.

Cook County has 9 county-level races on the upcoming ballot, with the nearest filing deadline on June 22, 2026. There are also 2 school board and local district races open to Cook County residents.

School board & local district races

Office Election date Filing deadline
Metropolitan Water Reclamation District Board Nov 3, 2026 Jun 22, 2026
Metropolitan Water Reclamation District Board Nov 5, 2030 TBD

About these offices

The District is responsible for stormwater and wastewater management, in an 883 square mile area, including Chicago and 125 suburban municipalities. It monitors and sustains 76 miles of the Chicago Area Waterways System and 1,300 small streams.

The District is responsible for storm water and wastewater management, in an 883 square mile area, including Chicago and 125 suburban municipalities. It monitors and sustains 76 miles of the Chicago Area Waterways System and 1,300 small streams.

Cook County races

Office Election date Filing deadline
Cook County Assessor Nov 3, 2026 Jun 22, 2026
Cook County Board President Nov 3, 2026 Jun 22, 2026
Cook County Clerk Nov 3, 2026 Jun 22, 2026
Cook County Sheriff Nov 3, 2026 Jun 22, 2026
Cook County Treasurer Nov 3, 2026 Jun 22, 2026
Cook County Commission - District 2 Nov 3, 2026 Jun 22, 2026
Cook County Board of Review Commissioner - District 3 Nov 7, 2028 Jun 26, 2028
Cook County Circuit Court Clerk Nov 7, 2028 Jun 26, 2028
Cook County State's Attorney Nov 7, 2028 Jun 26, 2028

About these offices

The Cook County Assessor is an elected government official who is responsible for establishing fair and accurate property assessments. Valuation of the county's 1.8 million parcels of property is conducted to ascertain the amount of taxes that will be required to be paid based on the value of the property in question. To administer this task, the Assessor reassesses one-third of the properties located in the county each year. The Assessor alternates assessments among the northern suburbs, the southern suburbs and the City of Chicago.

The President of the Cook County Board of Commissioners is the Chief Executive Officer of Cook County. The President oversees the Offices Under the President and is charged with presenting a balanced budget to the Board of Commissioners. The president presides over the meetings of the County Board and directly supervises departments which provide a variety of direct and support services to the residents of Cook County, appoints, with the advice and consent of the Board, persons to serve on various boards and commissions, with the advice and consent of the County Board, negotiates on behalf of the County with governmental units and private sector for the purpose of promoting economic growth and development.

The Clerk is responsible for the conduct of all elections. The Clerk is the official record keeper for all births, deaths, and marriages. The Clerk records the minutes of all County Board meetings. The Clerk's office processes all accounts payable for the county. In addition, the county payroll is processed in the Clerk's office.

The Sheriff is the Chief Law Enforcement Officer of the Circuit Court, Director of Safety and the Administrator of the County Jail. Main functions include: Provide basic police services to the unincorporated areas of the county. Maintain a complete record of all traffic accidents, arrest, investigations and complaints. Maintain security in the Courtrooms and Custodian of the Courthouse.

Treasurer receives and safely keeps the revenues and other public monies of the County, collects property taxes, distributes the monies collected to the proper recipients, invests surplus funds, pays the county's bills as directed by the Adams County Board, co-signature authorization on county checks, Store and disseminate tax records

County Commissioners are elected officials who oversee county activities and work to ensure that citizen concerns are met, federal and state requirements are fulfilled, and county operations run smoothly. The Board of Commissioners is responsible for the management of the affairs of the county

County Board of Review fairly and impartially reviews the assessments of all property within the county to the extent authorized by the Property Tax Code, corrects all assessments which should be corrected, raises, lowers, and/or directs the county Assessor to change, correct, alter, or modify assessments as justice may require. It also uses the authority provided by the Property Tax Code to ensure a full, fair and impartial assessment of property.

The County Court Clerk is responsible for maintaining court records, authenticating court orders and judgements, and administering oaths to witnesses and jurors.

The District Attorney is the chief legal representative of the district.

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Election data sourced from BallotReady / CivicEngine and updated weekly.