Sebastia

Sebastia (also Sebastea, Sebasteia; Greek Σεβαστεία) can refer to:

Places and jurisdictions
 the Latin name of a Roman Armenian city (renamed from "Megalopolis" under Augustus) and former metropolitan see, now Sivas in Asian Turkey and the Latin Catholic titular see Sebastea
 Sebasteia (theme), Byzantine province named after the former
 Malatia-Sebastia District in Yerevan, Armenia
 Samaria (ancient city), renamed Sebastia by Augustus 
 Sebastia, Nablus, a present-day village in the West Bank located directly adjacent to the ruins of ancient Samaria-Sebaste

Other 
 Sebastia (moth), a moth genus