The 1906 Wisconsin gubernatorial election was held on November 6, 1906. Primary elections were held on September 4, 1906.
Incumbent Republican Governor James O. Davidson won re-election, defeating Democratic nominee John A. Aylward and Social-Democratic nominee Winfield R. Gaylord, with 57.39% of the vote.
Primary election
Wisconsin voters passed a constitutional amendment in the 1904 general election to implement primary elections for nominations. The first direct primary took place on September 4, 1906.
Republican party
Candidates
- James O. Davidson, acting governor Governor
- Irvine Lenroot, incumbent Speaker of the Wisconsin State Assembly
Democratic party
Candidates
- John A. Aylward, Democratic nominee for Wisconsin's 2nd congressional district in 1900
- Ernst Merton, incumbent State Senator
Candidates
- Winfield R. Gaylord, Social-Democratic nominee for Wisconsin's 4th congressional district in 1904
Prohibition party
Candidates
- Ephraim Llewellyn Eaton, Prohibition nominee for Wisconsin's 4th congressional district in 1892
General election
Results by county
Counties that flipped from Democratic to Republican
- Crawford
- Door
- Florence
- Fond du Lac
- Green Lake
- Kewaunee
- Manitowoc
- Marquette
- Winnebago