The Deep Creek is a watercourse[2] of the Port Phillip catchment, located in the outer north western suburbs of Melbourne, in the Australian state of Victoria.

The creek then flows east again before resuming its southward course at Darraweit Guim, towards Bulla, joined by several minor tributaries.

[3] The deep and relatively narrow valley cut by the creek in its southward course through the surrounding basalt plains is particularly prominent at such localities as Darraweit Guim, Konagaderra and Bulla.

[1] Unregulated by major dams or diversions, the water levels in the creek show great seasonal variation.

Deep Creek flowed only seasonally along most of its length, although significant pools and stretches of water remain all year, some of which are local swimming holes.