Elections for the Pennsylvania State Senate were held on November 4, 2008, with odd-numbered districts being contested.

Republicans had a net gain of 1 seat for the 2008 elections, expanding their majority to 30-20.

[citation needed] Necessary primary elections were held on April 22, 2008.

[1] 1 Senator Rhoades died prior to the election but remained on the ballot.

As he was posthumously re-elected, his seat will be filled by a special election.