( Listen? / I ) oostzaan is a village and a municipality in the Dutch province of North Holland, between Amsterdam and Zaandam. The municipality has 9139 inhabitants (as of 1 January 2013) in an area of 16.69 km ², of which 3.43 km ² water. This corresponds to a population density of 693 inhabitants per km ².
The municipality Oostzaan include the village of Oostzaan and the hamlets of eight like Ting, De Haal, De Heul and Noordeinde.
In Oostzaan the composer Jan van Dijk was born in 1918.