Cassin
- Barbara Cassin
- Brian Cassin
- CCJO René Cassin
- Cassin Young
- Cassin class destroyer
- Cassin's auklet
- Cassin's finch
- Cassin's flycatcher
- Cassin's hawk-eagle
- Cassin's honeyguide
- Cassin's kingbird
- Cassin's sparrow
- Cassin's spinetail
- Cassin's vireo
- Cassinoceras
- Elena Cassin
- Jack Cassin
- John Cassin
- John Cassin (footballer)
- John Cassin (naval officer)
- René Cassin
- Riccardo Cassin
- Saint-Cassin
- Stan Cassin
- Stephen Cassin
- USS Cassin (DD-372)
- USS Cassin (DD-43)
- USS Cassin Young (DD-793)