The 1986 United States Senate election in Illinois was held on November 4, 1986. The incumbent Democrat U.S. Senator Alan J. Dixon won re-election to a second term. Until 2022, this was the most recent election in which an incumbent Senator won re-election to Illinois' Class 3 seat and was elected to more than one full term.
Primaries were held March 18, 1986.[1]
The primaries and general elections coincided with those for House, as well as those for state offices.[1][2]
For the primaries, the turnout was 21.84%, with 1,333,989 votes were cast.[1]
For the general election, turnout was 52.01%, with 3,122,833 votes cast.[2]
Dixon easily won the senate race. Koehler fared poorly throughout most parts of the state, only winning 10 of the state's 102 counties.[2]
Koehler's campaign was regarded as underfinanced.[5]