ARMS may refer to:
- ARMS (game), the Nintendo Switch video game
- ARMS (sport), the competitive, boxing-like sport that ARMS fighters participate in
- ARMS (extendable), the extendable appendages of an ARMS fighter's body
- ARMS (equipment), the weapons worn on the ends of a fighter's extendable ARMS
- ARMS (graphic novel), a graphic novel series based off of the game
Arms or arms refers only to normal human arms.