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  Shown within Turkey | |
| Location | Turkey |
|---|---|
| Region | Bursa Province |
| Coordinates | 40°10′10″N 28°40′57″E / 40.16944°N 28.68250°E |
| History | |
| Cultures | Ancient Greece, Byzantine Empire |
Apollonia or Apollonia-on-the-Rhyndacus (Ancient Greek: Ἀπολλωνία ἐπὶ Ῥυνδακῷ, Apollōnía épì Ryndakō; Latin: Apollonia ad Rhyndacum) was an ancient town opposite the delta of the Rhyndacus river in northwestern Anatolia and corresponds today to the town of Gölyazı.