2008 Wisconsin elections

The 2008 Wisconsin fall general election was held on November 4, 2008. All of Wisconsin's eight seats in the United States House of Representatives were up for election. Within the state government, sixteen seats in the Wisconsin State Senate, and all 99 seats in the Wisconsin State Assembly were up for election. At the presidential level, voters chose ten electors to represent them in the Electoral College, which then helped select the president of the United States. The 2008 fall partisan primary was held on September 9, 2008.

In the fall general election, the Democratic presidential candidate, Senator Barack Obama, won Wisconsin's ten electoral votes, defeating Senator John McCain. There was no change to the partisan makeup of Wisconsin's congressional delegation. The state senate saw no change in partisan composition, as all incumbents were re-elected, and vacancies in seats held by both parties were filled with no change to the party that held the seat. In the state assembly, Democrats gained five seats while one Independent was re-elected after having previously served as a Republican.

The 2008 Wisconsin spring election was held on April 1, 2008. This election saw a contested race for the Wisconsin Supreme Court, a presidential preference primary for both major political parties, a constitutional amendment referendum, as well as various nonpartisan local and judicial offices. The 2008 spring primary election was held on February 19, 2008.