Orphan School Creek is a tributary of Prospect Creek, located entirely within the City of Fairfield, NSW. It starts in Allambie Road Reserve, Bossley Park, on the border with Edensor Park, and flows in a generally eastern direction before emptying into Prospect Creek. The creek is a mostly natural waterway, with only the middle reach flowing through a concrete channel and piped system. It is approximately 10 kilometres (6.2 mi) in length, and has one tributary, Clear Paddock Creek. As the name suggests, Orphan School Creek was named after an orphan school in the area. It is not to be confused with Orphan School Creek, Sydney.