Peter Sandor Ujvagi (Hungarian Újvági Péter Sándor; 31 March 1949) is a retired Hungarian-born Democratic politician in Toledo and Lucas County, Ohio.

His nickname is "Mayor of East Toledo", a part of the city with a strong Hungarian-American and other Eastern European-descended population.

He was a member of the American delegation to the state funeral of Hungarian Prime Minister József Antall (1993).

While in the legislature, Ujvagi was very influential on budgetary issues, and for a time served as Chairman of the House Finance Committee's Transportation Subcommittee.

On 17 March 2010, Ujvagi resigned his seat in the Ohio House of Representatives to become the new Lucas County Administrator.