Grand Ayatollah of Iran

The title of Grand Ayatollah of Iran does not exist per se. The head of state of the Islamic Republic of Iran is the Supreme Leader. However, as the two men to have held the office, Ruhollah Khomeini and Ali Khamenei, also held the title of "grand ayatollah", the English-speaking world sometimes uses "Grand Ayatollah" and "Supreme Leader" interchangeably.

In the works of Harry Turtledove, the Grand Ayatollah of Iran may refer to:
 * Unnamed Grand Ayatollah of Iran (Supervolcano)
 * Grand Ayatollah (Alpha and Omega)