Cephalonia
| Cephalonia Περιφερειακή ενότητα Κεφαλληνίας | |
|---|---|
| View of Asos | |
| Coordinates: 38°15′54″N 20°33′09″E / 38.26500°N 20.55250°E | |
| Country | Greece | 
| Administrative region | Ionian Islands | 
| Seat | Argostoli | 
| Area | |
|  • Total | 773 km2 (298 sq mi) | 
| Elevation | 1,628 m (5,341 ft) | 
| Population  (2021) | |
|  • Total | 36,064 | 
| • Density | 47/km2 (120/sq mi) | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Postal code | 280 xx | 
| Area code(s) | 267x0 | 
| Vehicle registration | ΚΕ | 
| Website | www | 
Kefalonia or Cephalonia (Greek: Κεφαλονιά), formerly also known as Kefallinia or Kephallonia (Κεφαλληνία), is the largest of the Ionian Islands in western Greece and the 6th-largest island in Greece after Crete, Euboea, Lesbos, Rhodes and Chios. It is also a separate regional unit of the Ionian Islands region. It was a former Latin Catholic diocese Kefalonia–Zakynthos (Cefalonia–Zante) and short-lived titular see as just Kefalonia. The capital city of Cephalonia is Argostoli.