| Election Name: | 2014 Wisconsin Senate election |
| Country: | Wisconsin |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2012 Wisconsin Senate election |
| Previous Year: | 2012 |
| Next Election: | 2016 Wisconsin Senate election |
| Next Year: | 2016 |
| Seats For Election: | 17 of 33 seats in the Wisconsin Senate 17 seats needed for a majority |
| Election Date: | November 4, 2014 |
| 1Blank: | Seats up |
| 2Blank: | Races won |
| Image1: | Sen. Fitzgerald (3523124714).jpg |
| Image1 Size: | x150px |
| Leader1: | Scott Fitzgerald |
| Party1: | Republican Party of Wisconsin |
| Seats Before1: | 18 |
| Seats1: | 19 |
| Seat Change1: | 1 |
| Popular Vote1: | 623,358 |
| Percentage1: | 53.87% |
| Swing1: | 8.59 |
| 1Data1: | 10 |
| 2Data1: | 11 |
| Image2 Size: | x150px |
| Leader2: | Chris Larson (retired as leader) |
| Party2: | Democratic Party of Wisconsin |
| Seats Before2: | 15 |
| Seats2: | 14 |
| Seat Change2: | 1 |
| Popular Vote2: | 529,906 |
| Percentage2: | 45.80% |
| Swing2: | 7.33 |
| 1Data2: | 7 |
| 2Data2: | 6 |
| President | |
| Before Election: | Michael G. Ellis |
| Before Party: | Republican Party of Wisconsin |
| After Election: | Mary Lazich |
| After Party: | Republican Party of Wisconsin |
The 2014 Wisconsin Senate elections were held on Tuesday, November 4, 2014, at the Fall general election in Wisconsin. Seventeen of the 33 seats in the Wisconsin Senate were up for election - the odd-numbered districts. Before the election, Republicans held 17 seats, Democrats held 15 seats, and 1 seat was vacant. Of the seats up for election, 7 were held by Democrats, 9 were held by Republicans, and 1 was vacant due to the resignation of a Republican member. The primary election was held on August 12, 2014.
Republicans maintained control of the Senate, flipping one Democrat-held seat. They were set to enter the 102nd Wisconsin Legislature with 19 of 33 Senate seats, but one Republican Senator resigned after the election, leaving them with 18 seats at the start of the legislative term.
Elected members took office on January 5, 2015.
| Seats | Party (majority caucus shading) | Total | |||
|---|---|---|---|---|---|
| Democratic | Republican | ||||
| nowrap colspan=2 | Last election (2012) | 8 | 8 | 16 | |
| nowrap style="font-size:80%" colspan=2 | Total after last election (2012) | 15 | 18 | 33 | |
| nowrap style="font-size:80%" colspan=2 | Total before this election | 15 | 17 | 32 | |
| Up for election | 7 | 10 | 17 | ||
| of which: | nowrap style="font-size:80%" | Incumbent retiring | 3 | 3 | 6 |
| nowrap style="font-size:80%" | Vacated | 0 | 1 | 1 | |
| nowrap style="font-size:80%" | Unopposed | 2 | 0 | 2 | |
| nowrap style="background:#ccc" colspan=2 | This election | 6 | 11 | 17 | |
| nowrap style="font-size:80%" colspan=2 | Change from last election | 1 | 1 | ||
| nowrap style="font-size:80%" colspan=2 | Total after this election | 14 | 19 | 33 | |
| nowrap style="font-size:80%" colspan=2 | Change in total | 1 | 2 | ||
Seats where the margin of victory was under 10%:
| Dist. | Incumbent | This race[1] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Member | Party | First elect | Status | Candidates | Results | ||||||
| 01 | Republican | align=center | 2010 | Ran | nowrap | Incumbent re-elected | |||||
| 03 | Democratic | align=center | 2002 | Ran | nowrap | Incumbent re-elected | |||||
| 05 | Republican | align=center | 2010 | Ran | nowrap | Incumbent re-elected | |||||
| 07 | Democratic | align=center | 2010 | Ran | nowrap | Incumbent re-elected | |||||
| 09 | Republican | align=center | 2010 | Ran for U.S. House of Representatives | nowrap | Incumbent retired to run for U.S. House New member elected Republican hold | |||||
| 11 | --Vacant-- | nowrap | Incumbent resigned New member elected Republican hold | ||||||||
| 13 | Republican | align=center | 1994 | Ran | nowrap | Incumbent re-elected | |||||
| 15 | Democratic | align=center | 1974 (2010) | Did not run | nowrap | Incumbent retired New member elected Democratic hold | |||||
| 17 | Republican | align=center | 1991 | Did not run | nowrap | Incumbent retired New member elected Republican hold | |||||
| 19 | Republican | align=center | 1982 | Did not run | nowrap | Incumbent retired New member elected Republican hold | |||||
| 21 | Democratic | align=center | 2006 (2012) | Ran for lieutenant governor | nowrap | Incumbent retired to run for lieutenant governor New member elected Republican gain | |||||
| 23 | Republican | align=center | 2010 | Ran | nowrap | Incumbent re-elected | |||||
| 25 | Democratic | align=center | 1986 | Did not run | nowrap | Incumbent retired New member elected Democratic hold | |||||
| 27 | Democratic | align=center | 1986 | Ran | nowrap | Incumbent re-elected | |||||
| 29 | Republican | align=center | 2012 | Ran | nowrap | Incumbent re-elected | |||||
| 31 | Democratic | align=center | 2006 | Ran | nowrap | Incumbent re-elected | |||||
| 33 | Republican | align=center | 2012 | Ran | nowrap | Incumbent re-elected | |||||