Lockhart River, is a river in the Wheatbelt of Western Australia. It is a sub-catchment of the Avon River, and has an area of 32 400 km².
The Lockhart River catchment area is drained by the rivers:
Stream flow measured in the Yilgarn and Lockhart Rivers since 1976 shows there to be annual flow through these systems although flow volume is highly variable. Annual flow in the Lockhart River was in excess of 10 GL in seven out of the 25 years of record, while in 10 years it was less than 1 GL.
The river was extensively surveyed in 2008/2009
Coordinates: 12°53′S 143°24′E / 12.883°S 143.400°E