Small:      40-50%      50-60%      60-70%      70-80%      80-90% Frank Orren Lowden Republican Len Small Republican The 1920 Illinois gubernatorial election was held on November 2, 1920.

Incumbent first-term Republican Governor Frank Orren Lowden declined to stand for re-election.

He was an unsuccessful candidate for the Republican nomination for U.S. President at the 1920 Republican National Convention.

Republican nominee Len Small defeated Democratic nominee James Hamilton Lewis with 58.78% of the vote.

Primary elections were held on September 15, 1920.