Before European settlement it was inhabited by the Ngunawal, Walgalu and Djimantan Indigenous Australians.
The Wiradjuri considered the Ngarigo and Walgalu as one people using the name Guramal which has the basic meaning of 'gurai or 'hostile people.' Canberra, the capital city of the federal capital territory is very close to the boundary line between this and the Ngunawal tribe.