Blair Athol is a suburb of Sydney, in the state of New South Wales, Australia.

Blair Athol is located 57 kilometres south-west of the Sydney central business district, in the local government area of the City of Campbelltown and is part of the Macarthur region.

British settlers began moving into the area in the early 19th century, establishing farms and orchards in the fertile soil.

John Kidd, a Scotsman, built the original Blair Athol homestead in 1879.

Other languages spoken at home included Arabic 6.3%, Tagalog 5.9%, Hindi 4.8%, Lao 3.3% and Malayalam 3.0%.