Sydney vs Athens
Sydney is about 311× larger than Athens by administrative area. Sydney (Australia) covers 12,145 km² (4,689 mi²) with a population of 5.5 million, while Athens (Greece) covers 39 km² (15 mi²) with 643,452 residents.
| Metric | Sydney | Athens |
|---|---|---|
| Area | 12,145 km² | 39 km² |
| Area (mi²) | 4,689 mi² | 15 mi² |
| Population | 5,450,496 | 643,452 |
| Population density | 449 /km² | 16,499 /km² |
| Area ratio | Sydney is ~311× larger by area than Athens. | |
Frequently asked questions
Is Sydney bigger than Athens?
Yes — Sydney is about 311× larger by area: 12,145 km² vs 39 km².
How big is Sydney?
Sydney, Australia, covers about 12,145 km² (4,689 mi²) of administrative area.
How big is Athens?
Athens, Greece, covers about 39 km² (15 mi²) of administrative area.
Which city has more people, Sydney or Athens?
Sydney has the larger population: 5.5 million vs 643,452. Population density is about 449 people/km² in Sydney and 16,499 people/km² in Athens.
City boundaries from OpenStreetMap. Last updated 2026-08-18.
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