Mount Vernon is a suburb of Sydney, in the state of New South Wales, Australia. Mount Vernon is 42 kilometres west of the Sydney central business district, in the local government area of the City of Penrith and is part of the Greater Western Sydney region.
Mount Vernon is a sparsely populated rural suburb providing a close community atmosphere for its residents. It is a hilly suburb with views all the way to the Blue Mountains. Kemps Creek forms its northern and western boundary with Mamre Road providing a boundary on its west along with Kemps Creek.