The Hill River was named by the explorer, Captain George Grey, on 14 April 1839 during his party’s disastrous forced march along the coast from Gantheaume Bay to Perth. It is not known after whom Grey named the river.
The Hill River is 55 kilometres long. Surveyor H.S. Carey traversed it from Badgingarra to the ocean in 1880.
George Grey, Expeditions in Western Australia, Volumes I and II.
H.S. Carey, Fieldbooks 13 and 14.