Alvanley Johnston (12 May 1875 – 17 September 1951) was a Canadian / American locomotive engineer who became head of the Brotherhood of Locomotive Engineers (BLE), a union that covered the United States and Canada, holding the title of Grand Chief Engineer from 1925 to 1950.
During his tenure the Brotherhood recovered from financial problems, weathered the Great Depression and World War II, and held out for shorter hours and higher wages in a nationwide strike in 1946.