Fifteenth (disambiguation)

A fifteenth is a music interval of two octaves.

Fifteenth or 15th may also refer to
 * 15th in a sequence


 * History:
 * Fifteenth (tax), medieval English tax
 * Fifteenth Dynasty of Egypt, approximately 1650 to 1550 BC
 * Fifteenth Amendment (disambiguation)


 * Geography:
 * 15th Street (disambiguation)
 * 15th district (disambiguation)


 * Military:
 * 15th Army (disambiguation)
 * 15th Division (disambiguation)