Sebastia (also Sebastea, Sebasteia; Greek Σεβαστεία) may refer to: Sebastia, Nablus, a Palestinian village in the West Bank Sivas (), an Ancient Roman Armenian city, now Sivas in Turkey Sebasteia (theme), a Byzantine province named after the city Malatia-Sebastia District, in Yerevan, Armenia Sebastia (moth), a moth genus See also Sant Sebastià Sebastian (disambiguation)