Colyton is a suburb of Sydney, in the state of New South Wales, Australia 43 kilometres west of the Sydney central business district, in the local government area of the City of Penrith. It is part of the Greater Western Sydney region.
Colyton is the easternmost suburb of the City of Penrith. Its boundaries are Ropes Creek, the Great Western Highway, Marsden Road and the M4 Western Motorway. Colyton is one of the older suburbs in the St Marys area with homes on large blocks of land - primarily 1/4 acre and 1/3 acre blocks. Colyton is primarily a residential area with large sporting fields, Bennett Road Primary School, Colyton High School, Colyton Shopping Centre and the Life Education Centre. There is some industrial activity along Roper Road. Note that Colyton Primary School is not located in Colyton, but across the Great Western Highway in Old Mt Druitt.