Angelokastro (Greek: Αγγελόκαστρο) is a village and a former municipality in Aetolia-Acarnania, West Greece, Greece. Since the 2011 local government reform it is part of the municipality Agrinio, of which it is a municipal unit. The municipal unit has an area of 55.726 km.
Gjin Bua Shpata (sometimes anglicized as John Spata) (fl. 1358 – 29 October 1399) was an Albanian ruler of the despotate of Arta in Western Greece with the title of Despot. Together with Pjetër Losha, he led raids into Epirus, Acarnania and Aetolia in 1358. He was recognized as Despot by the titular Eastern Roman Emperor in the early 1360s and ruled Aetolia (1360s–?), Angelokastron (?–1399), Naupactus (1378–1399), and Arta (1370s–1399). He was born sometime in the first half of the 14th century in Epirus, as his father was a ruler in the region.