Casula is a Sydney suburb in the Australian state of New South Wales. It is located 34 kilometres south-west of Sydney's central business district, in the City of Liverpool local government area. On the Hume Highway and the Main Southern railway line between Sydney and Melbourne, Casula is the first suburb south of Liverpool. Casula is characterised by sloping, gently rolling land, with heights ranging from 30 to 70 metres above sea level. The suburb's eastern boundary is formed by the Georges River, which is paralleled on its western side by a very steep escarpment

Casula will soon be full by houses because home builders in casual consider it as the new suburb which will grow in a very short span of time.