John Wozniak was born March 21, 1956, in Ft. Knox, Kentucky, the son of John and Ann Ondreyik Wozniak. He graduated from Johnstown High School in 1974 and received his B.A. from the University of Pittsburgh at Johnstown in 1978.

He was elected to the Pennsylvania House of Representatives in 1980 where he served until his election to the Senate of Pennsylvania in 1996.

Sen. Wozniak serves as Democratic Chairman of the Senate Transportation Committee for the 2013-2014 session. He also is a member of the Senate Appropriations, Finance, and Intergovernmental Operations committees.

He and his wife, Vanessa, have two children: Michael and Rachel.