The Cook County, Illinois, general elections were held on November 8, 2022. Primaries were held on June 28, 2022.

Elections were held for Assessor, Clerk, Sheriff, Treasurer, President of the Cook County Board of Commissioners, all 17 seats of the Cook County Board of Commissioners, all three seats of the Cook County Board of Review, three seats on the Water Reclamation District Board, and judgeships on the Circuit Court of Cook County.

The Republican Party saw its representation on the Cook County Board of Commissioners reduced from two seats to a single seat. Cook County Commissioner Sean M. Morrison's victory by a margin of 2.58% in his district marked the only victory in a partisan county race for a Republican nominee, with Democrats winning all other partisan elections.

2022 was a midterm election year in the United States. The primaries and general elections for Cook County races coincided with those for federal (House and Senate) and those for state elections.

In the primary, turnout among registered voters was 21.14%. Turnout among registered voters in suburban Cook County was 19.61%, with 319,825 ballots cast. Turnout among registered voters in the City of Chicago was 22.81%, with 341,901 ballots cast.

First-term incumbent assessor Fritz Kaegi, a Democrat, was reelected to a second term.

In the Democratic primary, the incumbent Kaegi was challenged by Metropolitan Water Reclamation District President Kari Steele.

No candidates ran in the Republican primary.