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Sydney vs Mexico City

Sydney is about 8.2× larger than Mexico City by administrative area. Sydney (Australia) covers 12,145 km² (4,689 mi²) with a population of 5.5 million, while Mexico City (Mexico) covers 1,485 km² (573 mi²) with 9.2 million residents.

Metric Sydney Mexico City
Area 12,145 km² 1,485 km²
Area (mi²) 4,689 mi² 573 mi²
Population 5,450,496 9,209,944
Population density 449 /km² 6,202 /km²
Area ratioSydney is ~8.2× larger by area than Mexico City.

Frequently asked questions

Is Sydney bigger than Mexico City?

Yes — Sydney is about 8.2× larger by area: 12,145 km² vs 1,485 km².

How big is Sydney?

Sydney, Australia, covers about 12,145 km² (4,689 mi²) of administrative area.

How big is Mexico City?

Mexico City, Mexico, covers about 1,485 km² (573 mi²) of administrative area.

Which city has more people, Sydney or Mexico City?

Mexico City has the larger population: 9.2 million vs 5.5 million. Population density is about 449 people/km² in Sydney and 6,202 people/km² in Mexico City.

City boundaries from OpenStreetMap. Last updated 2026-08-20.

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