| Basil Megas Komnenos | |
|---|---|
| Emperor and Autocrat of all the East and Perateia | |
 Silver asper depicting Basil Megas Komnenos on horseback | |
| Emperor of Trebizond | |
| Reign | September 1332 – 6 April 1340 |
| Predecessor | Manuel II |
| Successor | Irene |
| Died | 6 April 1340 |
| Spouse | |
| Issue |
|
| Dynasty | Komnenos |
| Father | Alexios II Megas Komnenos |
| Mother | Djiadjak Jaqeli |
Basil Megas Komnenos (Medieval Greek: Βασίλειος Μέγας Κομνηνός, romanized: Basileios Megas Komnēnos) (died 6 April 1340) was Emperor of Trebizond from August 1332 until his death in 1340. Although Basil's reign was a period of stability during the civil war that dominated the pocket empire during the second quarter of the 14th century, some of that conflict had its origins in his marital actions.