Cardinal Orsini
- 1304–1305 papal conclave
- 1352 papal conclave
- Alessandro Orsini (cardinal)
- Domenico Orsini d'Aragona
- Flavio Orsini
- Franciotto Orsini
- Giacomo Orsini (cardinal)
- Giambattista Orsini
- Giordano Orsini (died 1287)
- Giordano Orsini (died 1438)
- Giovanni Gaetano Orsini (died 1335)
- Jordan of Santa Susanna
- Latino Malabranca Orsini
- Latino Orsini
- Matteo Orsini
- Napoleone Orsini (cardinal)
- Pope Nicholas III
- Rinaldo Orsini (cardinal)
- Vincenzo Maria Orsini
- Virginio Orsini (cardinal)