Kellyville is a suburb of Sydney, in the state of New South Wales, Australia 36 kilometres north-west of the Sydney central business district in the local government area of The Hills Shire. It is part of the Hills District region.

The Hills Shire is a local government area in the Greater Sydney region of Sydney, New South Wales, Australia. The area is north-west of the Sydney central business district, and encompasses 401 square kilometres (155 sq mi) stretching from the M2 Hills Motorway in the south to Wisemans Ferry on the Hawkesbury River in the north. The Hills Shire had a population of 191,876 as of the 2021 census.