1998 Cook County, Illinois elections

Voter turnout in Cook County during the primaries was 28.68%.[3]

On its own, suburban Cook County saw 23.95% turnout.[2][4]

The general election saw 54.61% turnout, with 1,433,423 ballots cast.[3] Chicago saw 752,506 ballots cast while suburban Cook County saw 53.95% turnout (with 680,917 ballots cast).[1][4]

Former Superintendent of the Chicago Police Department LeRoy Martin won the Republican primary.

Incumbent John H. Stroger, Jr. defeated Cook County commissioner Calvin R. Sutker.

Clerk of the Circuit Court of Cook County Aurelia Pucinski left the Democratic Party and joined the Republican party in December 1997 to run as its nominee for President of the Cook County Board of Commissioners.[7]

Incumbent commissioner Darlena Williams-Burnett, a Democrat appointed in 1997 after fellow Democrat Danny K. Davis resigned to serve in the United States House of Representatives, lost renomination in the Democratic primary to Earlean Collins.[2][8][9][10] Collins would go on to win the general election.

Incumbent third-term commissioner Bobbie L. Steele, a Democrat, was reelected, running unopposed in both the primary and general election.

No candidates ran in the Republican primary.[2]

Incumbent commissioner Jerry Butler, a Democrat who first assumed office in 1985, was reelected.

Incumbent commissioner John Stroger, a Democrat, was reelected, running unopposed in both the Democratic primary and general election.

No candidates ran in the Republican primary.[2]

Incumbent first-term commissioner Deborah Sims, a Democrat, was reelected.

No candidates ran in the Republican primary.[2]

Incumbent first-term commissioner Bud Fleming, a Republican, unsuccessfully sought reelection, being unseated by Democratic nominee William Moran.[11] Moran's victory of Flemming was considered an upset victory. Before winning this race, Moran had been regarded as a perennial candidate.[12][13]

William Moran, who had never held office, defeated John David Desimone, who had served as President of the Chicago Heights Park District since 1995.[14]

Incumbent first-term commissioner Joseph Mario Moreno, a Democrat, was reelected.

Republican primary winner Irma C. Lopez was replaced on the ballot by Alberto Alva.

Incumbent first-term commissioner Roberto Maldonado, a Democrat, was reelected, running unopposed in both the primary and general election.

Incumbent Roberto Maldono was challenged by Francisco Duprey, who had served as the director of school services for Chicago Public Schools and had also led Chicago's Department of Economic Development.[15][16]

No candidates ran in the Republican primary.[2]

Incumbent first-term commissioner Peter N. Silvestri, a Republican, was reelected.

Incumbent second-term commissioner Maria Pappas, a Democrat, did not seek reelection, instead opting to run for Cook County Treasurer. Democrat Mike Quigley was elected to succeed her in office.

No candidates ran in the Republican primary.[2]

Incumbent commissioner John P. Daley, a Democrat in office since 1992, was reelected.

Incumbent third-term[17] commissioner Ted Lechowicz, a Democrat, was reelected.

No candidates, ballot-certified or formal write-in, ran in the Republican primary.[1]

Incumbent first-term Commissioner Calvin Sutker, a Democrat, was reelected.

No candidates ran in the Republican primary.[2]

Incumbent commissioner Richard Siebel, a Republican, did not seek reelection. Republican Gregg Goslin was elected to succeed him.

No candidates ran in the Democratic primary.[2]

Incumbent sixth-term[18] commissioner Carl Hansen, a Republican, was reelected.

Incumbent Commissioner Allan C. Carr, a Republican, was reelected.

Democrat nominee John E. Bertone withdrew and was not replaced on the ballot.[19]

Incumbent third-term[20] commissioner Herb Schumann, a Republican, was reelected.

Republican Maureen Murphy defeated Democrat David B. McAfee.[22]

Joseph Berrios a ten incumbent on the predecessor organization, the Cook County Board of (Tax) Appeals, was elected, running unopposed in both the Democratic primary and general election.

No candidates ran in the Republican primary.[2]

Robert Shaw, a Democrat, was elected.

No candidates ran in the Republican primary.[2]

Three six-year term seats were up for an at-large election. Since three six-year seats were up for election, voters could vote for up to three candidates, and the top-three finishers would win.

A special election was held to fill a seat left vacant.

An advisory referendum was included on the March primary ballots on the Managed Care Act.