Barleycorn

Barleycorn may refer to:

• A grain of barley
• Barleycorn (unit) a unit of length, equal to one-third of an inch
• Barleycorn (surname)
• The Barleycorn, an Irish traditional music band
• "John Barleycorn", a traditional British folk-song
• John Barleycorn (novel), by Jack London