John or Johnny Blue may refer to:
John Blue (ice hockey) (born 1966), American ice hockey player John Rinehart Blue (1905–1965), American politician, educator and merchant John S. Blue (1902–1942), US Naval officer USS Blue (DD-744), US Navy ship named after John S. Blue Johnny Blue (song), Eurovision Song Contest entry for Germany Johnny Blue (album), 1981 Thorleifs album
See also Blue John (disambiguation)