Apollonia may be:

People:

• Saint Apollonia, of Alexandria
• Apollonia Kotero, musician & actor

Places:

• Apollonia, Cyrenaica
• Apollonia, Illyria
• Apollonia in Mygdonia, near modern Apollonia, Thessaloniki
• Apollonia, Pisidia, later called Sozopolis.
• Apollonia, Thrace now Sozopol
• A fort or castle near to Naupactus.
• A sea port town in Northern Sicily.
• A town astride the river in Bithynia next to the lake .
• An ancient town on Mediterranean coast, known also as Arsuf, near modern Herzliya, Israel.

Other:

• 358 Apollonia is a large Main belt asteroid.
• Apollonia 6 was the musical group led by Apollonia Kotero, taking over from Prince's defunct Vanity 6.
• Apollonia Vitelli-Corleone was a fictional character in Mario Puzo's The Godfather saga.