London vs San Francisco
London is about 2.6× larger than San Francisco by administrative area. London (United Kingdom) covers 1,572 km² (607 mi²) with a population of 8.8 million, while San Francisco (United States) covers 601 km² (232 mi²) with 873,965 residents.
| Metric | London | San Francisco |
|---|---|---|
| Area | 1,572 km² | 601 km² |
| Area (mi²) | 607 mi² | 232 mi² |
| Population | 8,799,728 | 873,965 |
| Population density | 5,598 /km² | 1,455 /km² |
| Area ratio | London is ~2.6× larger by area than San Francisco. | |
Frequently asked questions
Is London bigger than San Francisco?
Yes — London is about 2.6× larger by area: 1,572 km² vs 601 km².
How big is London?
London, United Kingdom, covers about 1,572 km² (607 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, London or San Francisco?
London has the larger population: 8.8 million vs 873,965. Population density is about 5,598 people/km² in London and 1,455 people/km² in San Francisco.
City boundaries from OpenStreetMap. Last updated 2026-08-28.
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