Crystal Creek Falls is a tiered, segmented waterfall located within Ku-ring-gai Chase National Park on Sydney's Northern Beaches, New South Wales.

Standing 20 metres high, the falls are formed by Crystal Creek cascading over a series of rock tiers before passing under McCarrs Creek Road and flowing into McCarrs Creek.

Despite sitting just metres from the road, the falls remain largely hidden from view behind dense tree cover. A short distance upstream, Crystal Creek begins as a shallow six-metre pool.

Near the base of the falls, smaller rock pools provide habitat for freshwater crayfish. The waterfall is easily reached with only a brief walk from McCarrs Creek Road.