Ouder-Amstel is a municipality in the Netherlands on the river Amstel, in the province of North Holland. It is 5 km (3.1 mi) south of the centre of Amsterdam.

The Amstel is a river in the province of North Holland in the Netherlands. It flows from the Aarkanaal and Drecht in Nieuwveen northwards, passing Uithoorn, Amstelveen, and Ouderkerk aan de Amstel, to the IJ in Amsterdam, to which the river gives its name. Annually, the river is the location of the Liberation Day concert, Head of the River Amstel rowing match, and the Amsterdam Gay Pride boat parade.