Old Blue

Old Blue may refer to:


 * Old Blue, an alumnus of Christ's Hospital
 * Old Blue, an alumnus of the University of California, Berkeley
 * Old Blue (song), an old folk song, from which many variations have arisen
 * Old Blue (rugby club), a Rugby Super League (US) team based in New York City
 * The type of British passport issued before 1993
 * Old Blue (black robin), the last remaining fertile female that saved the black robin from extinction
 * A conservation award given by Forest and Bird named after the black robin
 * A traditional name for Yale University