Kaag en Braassem is a municipality in the western Netherlands, in the province of South Holland. It was formed on January 1, 2009, through the merger of Alkemade and Jacobswoude.
Kaag en Braassem consists of 10 towns: Hoogmade, Kaag, Leimuiden, Nieuwe Wetering, Oud-Ade, Oude Wetering, Rijnsaterwoude, Rijpwetering, Roelofarendsveen, and Woubrugge. In addition, there are 5 hamlets: Bilderdam, Heimansbuurt, Ofwegen, Vriezekoop en Zevenhuizen.