Nyhavn (Danish pronunciation: [ˈnyhɑʊ̯n]) is a 17th century waterfront, canal and entertainment district in Copenhagen, Denmark. Stretching from Kongens Nytorv to the harbour front just south of the Royal Playhouse, it is lined by brightly coloured 17th and early 18th century townhouses and bars, cafes and restaurants. Serving as a "heritage harbour", the canal has many historical wooden ships.

Nyhavn was constructed by King Christian V from 1670-73, dug by Swedish war prisoners from the Dano-Swedish War 1658–1660. It is a gateway from the sea to the old inner city at Kongens Nytorv (King's Square), where ships handled cargo and fishermens' catch. It was notorious for beer, sailors, and prostitution. Danish author Hans Christian Andersen lived at Nyhavn 18 for some years.

As ocean-going ships grew larger, Nyhavn was taken over by internal Danish small vessel freight traffic. After World War II land transport took over this role and small vessel traffic disappeared from the Port of Copenhagen, leaving Nyhavn largely deserted of ships.