2008 Wisconsin Senate election

The 2008 Wisconsin Senate election was held on Tuesday, November 4, 2008. Sixteen of the 33 seats in the Wisconsin Senate were up for election—the even-numbered districts. Prior to the election 17 seats were held by Democrats, 14 were held by Republicans, and 2 seats were vacant.
The primary was held on September 9, 2008, and the filing deadline was July 8, 2008.

Summary

Close races

Seats where the margin of victory was under 10%:'

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Outgoing incumbents

Vacated

Roger Breske, first elected to the 12th district in a 1990 special election, resigned his seat on June 4, 2008, after being appointed Wisconsin Railroad Commissioner by governor Jim Doyle.
Carol Roessler, first elected to the 18th district in a 1987 special election, resigned her seat on July 4, 2008, after being appointed Administrator of State and Local Finance by governor Jim Doyle.