Cowan Creek is located in New South Wales, Australia.
It is a tidal subcatchment of the Hawkesbury River.
Almost all of the catchment lies within Ku-ring-gai Chase National Park.
On December 31, 2017, a de Havilland Canada DHC-2 Beaver crashed into Jerusalem Bay just off Cowan Creek, killing 6 people.
This article related to the geography of Sydney is a stub.