City size comparison

compared to

Hanoi is about 6 times bigger than Seoul.

Seoul is approximately 605 sq km, while Hanoi is approximately 3,360 sq km, making Hanoi 455% larger than Seoul.
Tip: This to-scale comparison of Seoul vs. Hanoi uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Hanoi vs. Seoul

Flip Comparison · See true size
See Hanoi on top of Seoul
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Cost of Living Comparison · 7 categories - 2026 data
Seoul is 2.2 times more expensive than Hanoi
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