Marin or Marín may refer to:

• Marin (name), including a list of persons with the given name or surname
• MaRin (Jang Gyeong-hwan), professional South Korean League of Legends player

Jang Gyeong-Hwan better known by his in-game name MaRin, is a professional League of Legends player who currently plays top laner for LGD Gaming. MaRin won the 2015 League of Legends World Championship with SK Telecom T1 and was named the Most Valuable Player of the event. He also played on SK Telecom T1 S before the team was consolidated with SK Telecom T1 K.

MARIN, the Maritime Research Institute Netherlands, is one of the leading institutes in the world for hydrodynamic research and maritime technology. The services incorporate a unique combination of simulation, model testing, full-scale measurements and training programmes. MARIN provides services to the shipbuilding and offshore industry and governments. Customers include commercial ship builders, fleet owners, naval architects, classification societies, oil and LNG companies and navies all over the world.