Prospect Creek is an urban watercourse of the Georges River catchment that is located in the western region of Sydney, in New South Wales, Australia. As Prospect Reservoir forms a part of the Sydney metropolitan water supply, the flow of the creek is regulated in accordance with the operational requirements of Sydney Water.

The Georges River, also known as Tucoerah River, is an intermediate tide-dominated drowned valley estuary, that is located in Sydney in the state of New South Wales, Australia. The Georges River is located south and south-west from the Sydney CBD, with the mouth of the river being at Botany Bay.