| Election Name: | 2012 Pennsylvania Senate election |
| Country: | Pennsylvania |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2010 Pennsylvania Senate election |
| Previous Year: | 2010 |
| Next Election: | 2014 Pennsylvania Senate election |
| Next Year: | 2014 |
| Seats For Election: | All odd-numbered seats in the Pennsylvania State Senate |
| Majority Seats: | 26 |
| Election Date: | November 6, 2012 |
| Leader1: | Joe Scarnati |
| Party1: | Republican Party (United States) |
| Leaders Seat1: | 25th district |
| Seats Before1: | 30 |
| Seat Change1: | 3 |
| Seats1: | 12 |
| Seats After1: | 27 |
| Leader2: | Jay Costa |
| Party2: | Democratic Party (United States) |
| Leaders Seat2: | 43rd District |
| Seats Before2: | 20 |
| Seat Change2: | 3 |
| Seats2: | 13 |
| Seats After2: | 23 |
| Map Size: | 350px |
The 2012 elections for the Pennsylvania State Senate were held on November 6, 2012, with all odd-numbered districts being contested.[1] The primary elections were held on April 24, 2012.[2] The term of office for those elected in 2012 began when the Senate convened in January 2013. Pennsylvania State Senators are elected to four-year terms, with 25 of the 50 seats contested every two years.[3]
| Affiliation | Members | ||
|---|---|---|---|
| Democratic | 23 | ||
| Republican | 27 | ||
| Total | 50 | ||
Source: Pennsylvania Department of State[1]