A lobster is a clawed marine crustacean.
Lobster or LOBSTER may also refer to:
- Spiny lobsters, slipper lobsters, furry lobsters, and squat lobsters, non-clawed marine crustaceans not directly related to the lobster
- Lobster clasp, a type of jewelry fastener
- Lobster mushroom, an edible North American mushroom resembling lobster meat
- Lobster graph in graph theory
- A historical derogatory term for British soldiers
- Lobster shift - work from 7pm to 3am as a copy boy: a name derived from its similarity to the hours worked by lobster fishermen
- Lobster Lake, a lake in Minnesota
- LOBSTER, a network monitoring system
Entertainment
- Lobster (novel), an erotic novel by Guillaume Lecasble
- The Lobster, a 2015 science fiction movie
- Lobster (magazine), a British parapolitics publication
- Lobster Records, an independent record label from Santa Barbara, California
- Lobster Johnson, a Dark Horse Comics character who appears in Hellboy and his own series
- Lobster Random, a 2000 AD character