Mark Gerald Mastroianni (born 1964) is a United States district judge of the United States District Court for the District of Massachusetts. He has served on the court since 2014. Prior to joining the federal bench, he was district attorney of Hampden County, Massachusetts.

- Gender
- Male
- Race
- White
Prior employment
- Hampden County, MassachusettsDistrict attorney · 2011–2014
- Private practice, Springfield, Massachusetts1991, 1995–2011
- Hampden County, MassachusettsAssistant district attorney · 1990–1991, 1991–1995
Appointments
2014–present · Appointed by Barack Obama (Democratic)
2014–present
Education
J.D. · 1989- American International CollegeB.A. · 1986