Marina Beach, or simply the Marina, is a natural urban beach in Chennai, Tamil Nadu, India, along the Bay of Bengal. The beach runs from near Fort St. George in the north to Foreshore Estate in the south, a distance of 6.0 km (3.7 mi), making it the second longest urban beach in the world, after Cox's Bazar Beach. It is a prominent landmark in Chennai.

An urban beach is an artificially-created environment in an urban setting which simulates a public beachfront, through the use of sand, beach umbrellas, and seating elements. Urban beaches are designed to surprise and delight city residents, workers, and visitors by inserting a beach atmosphere into an urban area that would otherwise be a typical cityscape.