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] Source: Pennsylvania Department of State[1]