Sydney vs Chicago
Sydney is about 20× larger than Chicago by administrative area. Sydney (Australia) covers 12,145 km² (4,689 mi²) with a population of 5.5 million, while Chicago (United States) covers 606 km² (234 mi²) with 2.7 million residents.
| Metric | Sydney | Chicago |
|---|---|---|
| Area | 12,145 km² | 606 km² |
| Area (mi²) | 4,689 mi² | 234 mi² |
| Population | 5,450,496 | 2,746,388 |
| Population density | 449 /km² | 4,529 /km² |
| Area ratio | Sydney is ~20× larger by area than Chicago. | |
Frequently asked questions
Is Sydney bigger than Chicago?
Yes — Sydney is about 20× larger by area: 12,145 km² vs 606 km².
How big is Sydney?
Sydney, Australia, covers about 12,145 km² (4,689 mi²) of administrative area.
How big is Chicago?
Chicago, United States, covers about 606 km² (234 mi²) of administrative area.
Which city has more people, Sydney or Chicago?
Sydney has the larger population: 5.5 million vs 2.7 million. Population density is about 449 people/km² in Sydney and 4,529 people/km² in Chicago.
City boundaries from OpenStreetMap. Last updated 2026-08-24.
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