Amfissa ( , also mentioned in classical sources as
Amphissa) is a town in
Phocis,
Greece, part of the municipality of
Delphi, of which it is the seat and a municipal unit. It lies on the northern edge of the olive forest of the Crissaean plain, between two mountains,
Giona to the west and
Parnassus to the east, northwest of
Athens and of Delphi, as well as northeast of
Naupactus and south of
Lamia.