Seoul vs San Francisco
Seoul is about 1.0× larger than San Francisco by administrative area. Seoul (South Korea) covers 605 km² (234 mi²) with a population of 9.7 million, while San Francisco (United States) covers 601 km² (232 mi²) with 873,965 residents.
| Metric | Seoul | San Francisco |
|---|---|---|
| Area | 605 km² | 601 km² |
| Area (mi²) | 234 mi² | 232 mi² |
| Population | 9,668,465 | 873,965 |
| Population density | 15,974 /km² | 1,455 /km² |
| Area ratio | Seoul is ~1.0× larger by area than San Francisco. | |
Frequently asked questions
Is Seoul bigger than San Francisco?
Yes — Seoul is about 1.0× larger by area: 605 km² vs 601 km².
How big is Seoul?
Seoul, South Korea, covers about 605 km² (234 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, Seoul or San Francisco?
Seoul has the larger population: 9.7 million vs 873,965. Population density is about 15,974 people/km² in Seoul and 1,455 people/km² in San Francisco.
City boundaries from OpenStreetMap. Last updated 2026-08-18.
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