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 last remaining fertile female that saved the Black Robin from extinction
• A conservation award given by Forest and Bird named after the Black Robin