John "Jack" Anwin (5 June 1867 in Collingwood, Victoria – 13 August 1956 in Caulfield, Victoria) was an Australian jockey who was best known for riding Bravo to victory in the 1889 Melbourne Cup.
Jack and his two brothers, Sam and George, were notable for taking the first three places in two races on 18 July 1903 in Boulder, Western Australia.