The 1904 Illinois gubernatorial election was held on November 8, 1904.
Incumbent Republican Governor Richard Yates Jr. was denied renomination by his party.
Republican nominee Charles S. Deneen defeated Democratic nominee Lawrence B. Stringer with 59.09% of the vote.
Democratic nomination.
Results.
The Democratic state convention was held on June 15, 1904, at the State Armory in Springfield.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
Following the 79th ballot, Lowden moved that the nomination of Deneen be made unanimous, which was carried viva voce.
General election.
Results.
! scope="col" colspan="2" style="width: 130px"|Party
! scope="col" style="width: 17em"|Candidate
! scope="col" style="width: 5em"|Votes
! scope="col" style="width: 3.5em"|%
! scope="col" style="width: 3.5em"| ;templatestyles src="Template:Tooltip/styles.css" / ;±%
! colspan="3" style="text-align: right; margin-right: 0.5em" | Majority
! colspan="3" style="text-align: right; margin-right: 0.5em" scope=row | Turnout
! style="text-align:right;" | Swing
References.
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