Akraifnia (Ακραιφνία) is a former municipality in Boeotia, Greece. Since the 2011 local government reform it is part of the municipality Orchomenos, of which it is a municipal unit. Population 3,230 (2001). The seat of the municipality was in Akraifnio. Acraephnium was an ancient Greek city (polis) on the eastern shore of Lake Copais. The ruins are about a mile from the modern village. There was a sanctuary there to Acraephian or Ptoan Apollo with an oracle. When Alexander razed Thebes those who were too weak or old to move to Attica settled at Acraphnium. The modern village was previously called Karditsa.
