John Blue

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