Nieuwendam (literal translation: "new dam") is a neighbourhood of Amsterdam, Netherlands, best known for its marina (Dutch: jachthaven).

A former village in the province of North Holland, Nieuwendam was a separate municipality until 1921, when it merged with Amsterdam, at the same time as Ransdorp.

The municipality also covered the village of Zunderdorp.

[1] Nowadays, it is part of the Amsterdam-Noord borough.