Deneen:      40-50%      50-60%      60-70%      70-80% Charles S. Deneen Republican Charles S. Deneen Republican The 1908 Illinois gubernatorial election was held on November 3, 1908.

Incumbent Republican Governor Charles S. Deneen defeated Democratic nominee and former Vice President of the United States Adlai E. Stevenson I with 47.64% of the vote.

Primary elections were held on August 8, 1908.