Katzensee is a lake on the border of the city of Zürich and Regensdorf in the Canton of Zürich, Switzerland. Its surface area is 36 ha (89 acres). There is also a public bath/lido Strandbad Katzensee on its southern shore.

oberer (upper) Katzensee, Zürich-Affoltern in the background (April 2009) unterer (lower) Katzensee Strandbad Katzensee Watercolour picture of Katzensee by Jakob Weidmann (1930)

• Media related to Katzensee at Wikimedia Commons