Patriarch Gregory of Alexandria may refer to:
Patriarch Gregory I of Alexandria, Greek Patriarch of Alexandria in 1243–1263 Patriarch Gregory II of Alexandria, Greek Patriarch of Alexandria in 1316–1354 Patriarch Gregory III of Alexandria, Greek Patriarch of Alexandria in 1354–1366 Patriarch Gregory IV of Alexandria, Greek Patriarch of Alexandria in 1398–1412 Patriarch Gregory V of Alexandria, Greek Patriarch of Alexandria in 1484–1486