John Arbuthnot (7 January 1861 – 18 September 1931) was a Canadian businessman and politician who served as an alderman and the 19th Mayor of Winnipeg. He was born in Grantham township, Lincoln County, Ontario. He was elected a Winnipeg alderman for 1896 and 1897 before serving as City Parks Board chair the following two years. He was elected as Mayor to serve terms from 1901 to 1903. In 1907 he left Winnipeg for British Columbia and remained in that province until his death in 1931. He initially worked in partnership with his brother-in-law James Malcolm Savage managing a coal mining company.