Grand Admiral of the Imperial Starfleet

The Grand Admiral of the Imperial Starfleet was the most senior flag officer of the Imperial Starfleet. The Grand Admiral served as a primary military advisor to the Emperor or Empress of the Terran Empire, and had operational control over the Imperial Starfleet. The position was also known as Commander-in-Chief of the Imperial Starfleet (C-in-C).

Grand Admirals of the Imperial Starfleet

 * unnamed Grand Admiral (circa 2264)
 * Grand Admiral $𝜇$ (until 2268)
 * Grand Admiral $𝜇$ (2268–2277
 * Grand Admiral $𝜇$ (2277
 * Grand Admiral $𝜇$ (2277)