SENATOR ANDY DINNIMAN was born in New Haven, Connecticut. He received his BA from the University of Connecticut in 1966, and his MA from the University of Maryland in 1969. He also holds an Ed.D from Pennsylvania State University.
Dinniman’s first elected position was as a member of Downingtown school district’s board of school directors. He was first elected to this position in 1975, and held the post until 1979. In 1979, Dinniman was elected chairman of the Chester County Democratic Committee, a position he held until 1985. Dinniman later served as Chester County commissioner for three terms, beginning in 1991. In a special election in 2008, Dinniman won a surprise victory to become the first Democrat elected to represent Chester County in the state senate since the 1920’s. Dinniman currently sits on five committees: Education; Communications and Technology; Agriculture and Rural Affairs; Environmental Resources and Energy; and State Government. He is the ranking Democrat on the Senate’s education committee.