Gregory L. DiDonato (born July 28, 1963) 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.

In 1990, DiDonato won a seat in the Ohio House of Representatives, serving the 97th district.

He stepped down to become the chairman of Tuscarawas County Democratic Party.

[1] DiDonato formerly served as the executive director of the Ohio Mid-Eastern Governments Association (OMEGA), stepping down in 2015 to return to Dennison as mayor.