Lisbon is about 2.5 times smaller than Sacramento.

Sacramento is approximately 253 sq km, while Lisbon (map shows its 24 named neighbourhoods; the area covers the whole city) is approximately 100 sq km, making Lisbon 39.55% the size of Sacramento.
Tip: This to-scale comparison of Sacramento vs. Lisbon uses the Mercator projection, which distorts the size of regions near the poles.
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