Pompey's Pillar is an ancient column in Alexandria, Egypt.

Pompey's Pillar may also refer to:

Pompeys Pillar National Monument, a large rock formation in Montana named after a member of the Lewis and Clark Expedition Pompey's Pillar, Montana, an unincorporated community in Montana, named after the rock formation Pompeys Pillar (South Australia), a mountain in Wilpena Pound The Pillar of Pompey, an ancient altar on the European side of the Symplegades