Bobtail may refer to:
- An animal with its tail bobbed
- A natural bobtail, an animal with a genetically short tail
- Donggyeongi, a Korean breed of dog
- Japanese Bobtail, a breed of cat
- American Bobtail, a breed of cat
- Kurilian Bobtail, a breed of cat
- A nickname for the Old English Sheepdog
- A bobtail lizard or skink, species Tiliqua rugosa.
- A bobtail squid
- A tractor unit not pulling a trailer.