| Office: | Mayor of South Portland, Maine |
| Term: | 1986–1987 |
| Party: | Democratic |
| Office1: | Member of the Maine House of Representatives |
| Term1: | 1989–1996 |
| Birth Date: | 11 November 1934 |
| Birth Place: | Portland, Maine |
| Death Place: | South Portland, Maine |
| Alma Mater: | Northeast Business College |
| Occupation: | Businessman |
| Nickname: | Sam |
Santo "Sam" DiPietro (November 11, 1934 – October 9, 2016) was an American businessperson and politician from Maine. DiPietro, a Democrat, served on the South Portland City Council for nine years, two of which were as mayor (1986–1987). He also served four terms (8 years) in the Maine House of Representatives (1989–1996).[1] In 1988, DiPietro defeated Republican incumbent Earl G. Nicholson to win his seat in the Legislature.[2]
Born in Portland, Maine, DiPietro graduated from Portland High School and Northeast Business College. He owned and operated a grocery store, DiPietro's Market, in South Portland.
DiPietro died in South Portland, Maine on October 9, 2016.[3]