Which ocean does river Lachlan flow into?

River Lachlan does not flow into any ocean. It is located in the endorheic basin of the Murray-Darling system in south-eastern Australia, meaning it terminates in a lake or wetland without reaching the sea. Specifically, the Lachlan River flows into the Great Cumbung Swamp in the southwest of New South Wales, where its water either evaporates or seeps into the ground.