Holsworthy is a suburb in south-western Sydney, in the state of New South Wales, Australia 31 kilometres south-west of the Sydney central business district, in the local government area of the City of Liverpool and partly in the Sutherland Shire.
Holsworthy is most notable for a large Australian Army reserve, Holsworthy Barracks, where training exercises are frequently carried out. The reserve is adjacent to Heathcote Road, which connects to Bankstown, Liverpool, Lucas Heights, Engadine and Heathcote. Signs on the perimeter warn potential trespassers of the use of laser guided and conventional gunfire.
The residential area is located north of the railway station. Anzac Village is a locality in the northern part of the suburb and the adjacent suburb of Wattle Grove. A new development called 'Mornington' has recently been built in this region. A shopping centre has also been built in this area.