Sungei Serangoon (Malay for Serangoon River; Chinese: 实龙岗河) is a river in the north-eastern part of Singapore. The 6-kilometre river starts as a canal near Tampines Road, and flows through Hougang, Sengkang, Punggol, Lorong Halus and Pasir Ris, before emptying into the Serangoon Harbour. The river is also known as the Serangoon Estuary.