Alessandro Orsini (1592–1626) was an Italian Cardinal. He was a patron of Galileo, who dedicated his 1616 work on the tides to him, and requested that he pass it on to Pope Paul V. Orsini belonged to the ducal family of Bracciano.
- Occupation
- Catholic priest, Catholic bishop
- Position held
- cardinal
- Citizenship
- Papal States
- Born
- 1592
- Died
- August 22, 1626
