Sydney vs San Francisco
Sydney is about 20× larger than San Francisco by administrative area. Sydney (Australia) covers 12,145 km² (4,689 mi²) with a population of 5.5 million, while San Francisco (United States) covers 601 km² (232 mi²) with 873,965 residents.
| Metric | Sydney | San Francisco |
|---|---|---|
| Area | 12,145 km² | 601 km² |
| Area (mi²) | 4,689 mi² | 232 mi² |
| Population | 5,450,496 | 873,965 |
| Population density | 449 /km² | 1,455 /km² |
| Area ratio | Sydney is ~20× larger by area than San Francisco. | |
Frequently asked questions
Is Sydney bigger than San Francisco?
Yes — Sydney is about 20× larger by area: 12,145 km² vs 601 km².
How big is Sydney?
Sydney, Australia, covers about 12,145 km² (4,689 mi²) of administrative area.
How big is San Francisco?
San Francisco, United States, covers about 601 km² (232 mi²) of administrative area.
Which city has more people, Sydney or San Francisco?
Sydney has the larger population: 5.5 million vs 873,965. Population density is about 449 people/km² in Sydney and 1,455 people/km² in San Francisco.
City boundaries from OpenStreetMap. Last updated 2026-08-19.
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