John Harry Grainger (30 November 1854 - 15 April 1917) was an Australian architect and civil engineer, who was also the father of musician Percy Grainger. He designed 14 bridges, notably Princes Bridge in Melbourne. As an architect, he designed half a dozen major public buildings, mainly in New Zealand, Perth, and Melbourne, notably the WA Supreme Court, while he was Principal Architect in the Architectural Division of the Public Works Department of Western Australia. He also designed some major commercial buildings in Melbourne (mostly demolished) such as George’s Store over his long career, between 1878 and 1915.