| Election Name: | 2011 New Jersey Senate elections |
| Popular Vote2: | 645,569 |
| Percentage2: | 48.7% |
| Leader2: | Thomas Kean Jr. |
| Leaders Seat2: | 21st (Westfield) |
| Last Election2: | 17 |
| Seats Before2: | 16 |
| Seats2: | 16 |
| Before Election: | Steve Sweeney |
| Seats1: | 24 |
| Senate President | |
| Before Party: | Democratic Party (United States) |
| After Election: | Steve Sweeney |
| After Party: | Democratic Party (United States) |
| Party2: | Republican Party (United States) |
| Seats Before1: | 24 |
| Next Election: | 2013 New Jersey State Senate election |
| Election Date: | November 4, 2011 |
| Seats For Election: | All 40 seats in the New Jersey State Senate |
| Majority Seats: | 21 |
| Previous Year: | 2007 |
| Previous Election: | 2007 New Jersey State Senate election |
| Next Year: | 2013 |
| Ongoing: | no |
| Last Election1: | 23 |
| Type: | legislative |
| Country: | New Jersey |
| Image1: | File:Senate President Stephen M. Sweeney (cropped).jpg |
| Leader1: | Steve Sweeney |
| Leaders Seat1: | 3rd (West Deptford) |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 677,435 |
| Percentage1: | 51.1% |
| Map Size: | x300px |
The 2011 New Jersey State Senate elections were held on November 4. The election took place midway through Chris Christie's first term as Governor of New Jersey. No seats changed hands, though Democrats had gained one seat in a 2010 special election with Linda Greenstein's victory over Tom Goodwin.
This was the first election under maps drawn after the 2010 census. Three incumbents retired from the Senate including Sean Kean, who was redistricted into Jennifer Beck's district and ran for Assembly rather than challenge her.
| Contents Incumbents not running • Summary of results By District: 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 • 29 • 30 • 31 • 32 • 33 • 34 • 35 • 36 • 37 • 38 • 39 • 40 |