Elections were held in Illinois on Tuesday, November 4, 1958. Primaries were held April 8, 1958. Election information 1958 was a midterm election year in the United States. Turnout In the primary election, 1,594,388 ballots were cast (831,502 Democratic and 762,886 Republican). In the general election, turnout was 67.72% with 3,427,278 ballots cast. Federal elections United States House All 25 Illinois seats in the United States House of Representatives were up for election in 1958. Democrats flipped three Republican-held seats, leaving the Illinois House delegation to consist of 14 Democrats and 11 Republicans. State elections Treasurer Incumbent Treasurer, Republican Elmer J. Hoffman, did not seek reelection, instead running successfully for Illinois's 14th congressional district. Democrat Joseph D. Lohman was elected to succeed him, defeating former two-term Illinois Treasurer, Republican Warren Wright. Democratic primary Republican primary Former treasurer Warren Wright won the Republican primary, defeating State Representative Louis E. Beckman Jr. General election Superintendent of Public Instruction Incumbent Superintendent of Public Instruction Vernon L. Nickell, a fourth-term Republican, did not seek reelection. Democrat George T. Wilkins was elected to succeed him. Democratic primary Republican primary General election State Senate Seats in the Illinois Senate were up for election in 1958. Republicans retained control of the chamber. State House of Representatives Seats in the Illinois House of Representatives were up for election in 1958. Democrats flipped control of the chamber. Trustees of University of Illinois An election was held for three of nine seats for Trustees of University of Illinois. The election saw the reelection of one-term member former member Harold Pogue and the election of new Democratic members Howard W. Clement, Richard A. Harewood. The election saw third-term incumbent Republican Park Livingston, second term Republican incumbent Doris Simpson Holt and first-term incumbent Republican Cushman B. Bissell lose reelection. Judicial elections Lower courts On June 8, 1958, the Superior Court of Cook County held three regular elections and two special elections. On September 2, 1958, a special election was held for a vacant seat on the 12th Judicial Circuit. Ballot measures Three ballot measures were put before voters in 1958. One was a legislatively referred state statutes and two were legislatively referred constitutional amendments. In order to be approved, legislatively referred state statues required the support of a majority of those voting on the statute. In order to be placed on the ballot, proposed legislatively referred constitutional amendments needed to be approved