The Cook County, Illinois, general elections will be held on November 3, 2026. Primaries will be held on March 17, 2026.
Elections will be held for assessor, clerk, sheriff, treasurer, president of the Cook County Board of Commissioners, all 17 seats of the Cook County Board of Commissioners, two seats of the Cook County Board of Review, four seats on the Water Reclamation District Board, and judgeships on the Circuit Court of Cook County.
Second-term incumbent Fritz Kaegi, a Democrat, was defeated in his party's primary.
No candidate ran in the Republican primary.
Nico Tsatsoulis is the only candidate in the Libertarian primary. He also ran as the party's nominee in 2022, receiving over 200,000 votes in the general election.
No candidate ran in the Republican primary.
Hontas Farmer ran as a write-in in the Libertarian Party primary.
No candidate ran in the Republican primary.
No candidate ran in the Republican primary.
Incumbent Toni Preckwinkle, a Democrat, was nominated by her party for a fifth term as county board president.
In the Republican primary for county board president, one candidate filed for the ballot, but was removed from the ballot before the primary. Max Rice and Eric Wallace ran as write-in candidates.
Michael Murphy and Justin Tucker contested the Libertarian primary. Michael Murphy, a Chicago resident, prevailed.
The 2026 Cook County Board of Commissioners election will see all 17 seats of the Cook County Board of Commissioners up for election to four-year terms.
In the 2026 Cook County Board of Review election, two seats, both of which are Democratic-held, are up for reelection.
No candidate ran in the Republican primary.
No candidate ran in the Republican primary.
In the 2026 Metropolitan Water Reclamation District of Greater Chicago election, three six-year term seats were up for a regularly scheduled election and an additional seat was upon for election to a partial term in a special election.
Three seats with six-year terms were up for election in the regular election, with voters able to vote for up to three candidates. In both the primaries and general election, the top-three finishers were the winners.
No candidate ran in the Republican primary.
A seat with a partial unexpired term was up for election.
No candidate ran in the Republican primary.
Judicial elections to the Circuit Court of Cook County will also be held.
Coinciding with the primaries, elections will be held to elect both the Democratic and Republican committeepeople for the suburban townships.
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