Old Man of the Mountain is a former rock formation and New Hampshire landmark.

Old Man of the Mountain may also refer to:

• Old Man of the Mountain (Assassin), referring to
  • Hassan-i Sabbah (c. 1050–1124), founder of the Nizari Isma'ili state and its military group known as the Order of Assassins
  • Rashid ad-Din Sinan (c. 1134–1193), Nizari leader in Syria
• Brian Timmis (1899–1971), Canadian football player

• The Old Man of the Mountain (film), a 1933 Betty Boop cartoon
• "Old Man of the Mountain", a 2015 episode of Mike Tyson Mysteries
• Hymenoxys grandiflora, an alpine sunflower in North America
• Oreocereus, a genus of cacti in South America

• Mountain Man (disambiguation)

This disambiguation page lists articles associated with the title Old Man of the Mountain.
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