Belisarius (c. 500 – 565) was a military commander of the Byzantine Empire under the emperor Justinian I.
Belisarius may also refer to: Belisarius (scorpion), genus of scorpions Belisarius (play), 1724 tragedy by the British writer William Phillips Belisarius (1781 ship), privateer ship of the United States Belisarius Productions, production company Belisarius series, a series of alternate history books by Eric Flint and David Drake
See also Belisarius (ship) for other ships with a similar spelling Piotr Domaradzki, Polish-American journalist who edited in Wikipedia under the name Bellisarius Velizar, Serbian and Bulgarian masculine given name