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2026 Illinois Primary Election

2026 Illinois Primary Election header

Cook County Treasurer

The Cook County treasurer is responsible for collecting, safeguarding, investing and distributing property tax funds.

Candidates

Did not participate

Maria Pappas

Incumbent Democrat

Did not participate in the 2026 voter guide.

Latest Coverage

Chicago’s hybrid Board of Education meets for the first time at the Chicago Public Schools Loop headquarters on Jan. 15, 2025. (WTTW News)

51 Candidates Set to Run for Chicago’s First Fully Elected School Board

The U.S. Supreme Court Building is pictured in a file photo. (searagen / iStock)

States Continue Redistricting Rush in the Wake of Supreme Court Decision

Members of the Illinois General Assembly applaud U.S. Sen. Dick Durbin on May 27, 2026. (Nick Blumberg / WTTW News)

Illinois Lawmakers Hail Retiring US Sen. Dick Durbin at Joint Session in Capitol

The Rev. Jesse Jackson Sr. is honored at the Democratic National Convention at the United Center on Aug. 19, 2024. (WTTW News)

Final Vote Set for Scaled-Back Effort to Honor Rev. Jesse Jackson With New Push to Protect Voting Rights

Dan Osborn, Independent candidate for U.S. Senate, speaks during a news conference, May 15, 2024, at his home in Omaha, Neb. (Nikos Frazier/Omaha World-Herald via AP, File)

Democrats Test a New Red State Strategy: Back Independents Over Their Own Nominees

(Fintan Trimble / iStock)

Redistricting War Accelerates Winner-Take-All Political Combat That’s Straining American Democracy

See more election coverage