Galston is a semi-rural suburb located in the Hills District of Sydney, in the state of New South Wales, Australia. Galston is located from the city at 36 kilometres north-west of the Sydney central business district, in the local government area of the Hornsby Shire. Galston is in the NSW state electoral district of Hornsby and Federal division of Berowra. Galston is situated 16 minutes away from the town of Hornsby.
The aboriginal inhabitants of the region were from the Dharug language group. The area was originally known as Upper Dural until early settler Alex Hutchinson suggested in 1886 that the new school be named Galston after the town of Galston, East Ayrshire in Scotland. Galston had been an agricultural town since European settlement began, and it was home to a huge number of orchid growers. Galston Public School, Fagan Park and Waddell Cottage are some notable historical places in Galston. In 1973 Galston was proposed as one option for Sydney's second international airport but this proposal did not proceed