Look up porpoise in Wiktionary, the free dictionary.
A porpoise is a marine mammal of the family Phocoenidae.
Porpoise may also refer to:
- Dolphin or dolphin-like marine mammal, previously used in American English
- Porpoise (scuba gear), a trade name for scuba gear developed by Ted Eldred in Australia
- Porpoise class submarine (disambiguation), various classes of British or United States submarines
- HMS Porpoise, several British Royal Navy ships
- USS Porpoise, several United States Navy ships
- Karry Porpoise, a Chinese electric commercial van
- President Porpoise, a character in the animated series Adventure Time episode "President Porpoise Is Missing!"