Mays Hill is a suburb of Sydney, in the state of New South Wales, Australia.

Mays Hill is located 24 kilometres west of the Sydney central business district, in the local government areas of the Cumberland Council and City of Parramatta, and is part of the Greater Western Sydney region.

Originally some of the lands that is now Mays Hill was part of the governor's domain.

A painting by George Edwards Peacock in 1840 shows the area was already known as Mays Hill, long before Thomas May's association with the Parramatta area began in 1859.

[3] Mays Hill Cemetery is one of four historic cemeteries in the City of Parramatta local government area and contains the graves of many well known local pioneering families including the Paytens, Fullagars, Houisons, Downs, Ardills and Mustons.