Admiral Johnston may refer to:
Charles H. Johnston (born 1948), U.S. Navy rear admiral Clarence Johnston (1903–1996), British Royal Navy admiral Clive Johnstone (born 1963), British Royal Navy vice admiral David Johnston (admiral) (born 1962), Royal Australian Navy vice admiral Means Johnston Jr. (1916–1989), U.S. Navy admiral Rufus Zenas Johnston (1874–1959), U.S. Navy rear admiral
See also Tony Johnstone-Burt (born 1958), British Royal Navy vice admiral