City size comparison

compared to

Hanoi is around the same size as Sydney.

Sydney (the 30 councils of metropolitan Sydney, without the Blue Mountains, Hawkesbury, Wollondilly and the Central Coast) is approximately 3,810 sq km, while Hanoi is approximately 3,360 sq km, making Hanoi 88.19% the size of Sydney.
Tip: This to-scale comparison of Sydney vs. Hanoi uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Hanoi vs. Sydney

Flip Comparison · See true size
See Hanoi on top of Sydney
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Cost of Living Comparison · 7 categories - 2026 data
Sydney is 3.5 times more expensive than Hanoi
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