Missoula is about 9 times smaller than New York City.

New York City (including all five boroughs: Manhattan, Brooklyn, Queens, The Bronx, and Staten Island) is approximately 781 sq km, while Missoula (map shows its 17 named neighbourhoods; the area covers the whole city) is approximately 91 sq km, making Missoula 11.62% the size of New York City.
Tip: This to-scale comparison of New York City vs. Missoula uses the Mercator projection, which distorts the size of regions near the poles.
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