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.

According to the 2011 census of Population, there were 2,711 residents in Blair Athol. In Blair Athol, 51.0% of people were born in Australia. The most common countries of birth were Philippines 10.2%, India 4.3%, Fiji 4.1%, Laos 3.2% and New Zealand 2.2%. 53.0% of residents only spoke English at home. Other languages spoken at home included Hindi 6.6%, Tagalog 6.6%, Lao 3.8%, Filipino 2.7% and Spanish 2.4%. The most common responses for religion in Blair Athol were Catholic 35.3%, Anglican 11.3%, No Religion 8.0%, Buddhism 7.9% and Islam 7.3%.