Mexico City is about 15 times bigger than Lisbon.

Lisbon (map shows its 24 named neighbourhoods; the area covers the whole city) is approximately 100 sq km, while Mexico City is approximately 1,485 sq km, making Mexico City 1,384% larger than Lisbon.
Tip: This to-scale comparison of Lisbon vs. Mexico City uses the Mercator projection, which distorts the size of regions near the poles.
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