The 2002 Wisconsin gubernatorial election was held on November 5, 2002. Incumbent Republican Governor of Wisconsin Scott McCallum, who had assumed office upon the resignation of Tommy Thompson, ran for his first full term in office. McCallum won his party's nomination by defeating two minor candidates, and Attorney General of Wisconsin Jim Doyle won the Democratic primary with a little more than a third of the vote in a highly competitive primary election. In the general election, the presence of Ed Thompson, former Governor Tommy Thompson's younger brother, the Mayor of Tomah, and the Libertarian Party nominee, held both McCallum and Doyle to under fifty percent of the vote, enabling Doyle to win with 45% of the vote, defeating McCallum. As of 2022, this is the last gubernatorial election in which the Democratic candidate carried Langlade, Manitowoc, Marquette, Racine, and Taylor counties, and the last in which Juneau County did not vote for the Republican candidate, instead voting for Thompson.

Republican primary

McCallum, as the incumbent governor, did not face significant opposition in the primary. He was nominated with 86% of the primary vote.

Governor

Candidates

Results

Lieutenant governor

Candidates

Results

Democratic primary

The primary election for the Democratic nomination was closely contested by three competitive candidates. The race was ultimately won by Jim Doyle with around 38% of the vote.

Governor

Candidates

Polling

Results

[Democratic Primary results by county:

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Lieutenant governor

Candidates

Results

Libertarian primary

Governor

Candidates

Results

Lieutenant governor

Candidates

Green primary

Governor

Candidates

Results

Lieutenant governor

Candidates

Results

Independent nominations

Candidates

Results

General election

Candidates

Predictions

Polling

Results

Results by county

Richland County voted Democratic for the first time since 1924 and only the second time since 1857. Doyle was the first Democrat since Albert G. Schmedeman in 1932 to win Columbia County, Grant County, Columbia County, Iowa County and Sauk County. Additionally, Doyle was also the first Democrat since Schmedeman in 1934 to win Marquette County

Counties that flipped Republican to Democratic

Counties that flipped from Republican to Libertarian