The 2006 Wisconsin gubernatorial election was held on November 7, 2006. Incumbent Democratic Governor Jim Doyle ran for re-election to a second term in office. Doyle was unopposed in the Democratic primary, and he faced U.S. Representative Mark Green, who was unopposed in the Republican primary, in the general election. The campaign between Doyle and Green was competitive and hotly contested, but Doyle, whose approval ratings hovered around 50%, had the upper hand. In the end, Doyle defeated Green by a fairly comfortable margin, improving on his 2002 victory in the process. This was the only Wisconsin gubernatorial election won by a Democrat with an outright majority of the vote between 1982 and 2022, and remains the largest winning margin garnered by a Democrat since 1982. This election was the first time since 1974 that an incumbent Democratic Governor was re-elected or won re-election.

Democratic primary

Governor

Candidates

Results

Lieutenant governor

Candidates

Results

Republican primary

Governor

Candidates

Withdrew

Results

Lieutenant governor

Candidates

Results

Green primary

Governor

Candidates

Results

Lieutenant governor

Candidates

Results

General election

Predictions

Polling

Results

Results by county

Doyle became only the third Democrat to carry Door County; the only two previous gubernatorial elections in which it had voted Democratic were 1859 and 1904. Door County would not vote Democratic again until 2022. Doyle was also the first Democrat since Albert G. Schmedeman in 1932 to win Monroe County. As of 2024, this is the last gubernatorial election in which the Democratic candidate carried the counties of Adams, Barron, Buffalo, Burnett, Chippewa, Clark, Dunn, Forest, Iron, Jackson, Lafayette, Lincoln, Marathon, Monroe, Oneida, Outagamie, Pepin, Pierce, Polk, Price, Rusk, Sawyer, St. Croix, Washburn, Winnebago, and Wood.

Counties that flipped Republican to Democratic

Counties that flipped from Libertarian to Democratic

Counties that flipped from Libertarian to Republican

Counties that flipped from Democratic to Republican