Gregory L. DiDonato of Dennison, Ohio, is an American politician of the Democratic party. While still in high school, DiDonato was elected to the village council of Dennison, Ohio. At age 21, he was elected mayor of the Village of Dennison. He was re-elected mayor in 1987. While in college, he worked as a baker. Afterwards, he worked for a grocery distribution company. In 1990, DiDonato won a seat in the Ohio House of Representatives, serving the 97th district.