The Noosa River is a relatively unmodified river system flowing through the Noosa Shire in Queensland, Australia, renowned for its high environmental and scenic values. It winds south for over 50 kilometers through coastal forests and a series of wide, shallow, sandy lakes before passing through urban areas and emptying into the Pacific Ocean. The system is unique among Queensland estuaries for its transition from freshwater to hypersaline waters in its lakes and contains the largest riverine seagrass beds in south-east Queensland. The lower estuary and tidal delta are under constant pressure from urban development, which has contributed to increased sediment loads. The entire system, including parts of Weyba Creek and associated lakes, is a declared Fish Habitat Area, managed to protect its significant nursery grounds for fish and crustaceans.