Robert David Mariani (born Robert Eugene Mariani, April 16, 1950) is an American lawyer and labor advocate who now serves as a senior United States district judge of the United States District Court for the Middle District of Pennsylvania.

- Gender
- Male
- Race
- White
Prior employment
- Private practice, Scranton, Pennsylvania1976–2011
- Scranton [Pennsylvania] Sewer AuthoritySolicitor · 1978–1980
Appointments
2011–2022 · Appointed by Barack Obama (Democratic)
Education
J.D. · 1976- Villanova UniversityA.B. · 1972