The village of Blackheath is in the upper Blue Mountains, New South Wales, Australia. At an altitude of 1065 metres, it is about 120 km west of Sydney, around 1 3/4 hours from central Sydney by car, or two hours by commuter rail. It lies near the highest part of the Blue Mountains National Park - one of eight conservation reserves that make up the Greater Blue Mountains World Heritage Area.

The Blue Mountains (so named because of the bluish haze produced by the interplay of strong sunlight on fine droplets of eucalyptus oil released by the forests that cover the rugged tablelands and deep valleys) presented a major obstacle to explorers from the early colony in Sydney. Twenty five years elapsed from the establishment of the first settlement at Sydney (1788) to the crossing of the these mountains by Blaxland, Wentworth and Lawson in 1813.

Charles Darwin visited Blackheath in 1832. The distinguished pre-historian, Vere Gordon Childe, fell to his death from Govett's Leap in 1956.