Atlanta is about 349 times smaller than New York.

New York is approximately 122,283 sq km, while Atlanta (map shows its 114 named neighbourhoods; the area covers the whole city) is approximately 350 sq km, making Atlanta 0.29% the size of New York.
Tip: This to-scale comparison of New York vs. Atlanta uses the Mercator projection, which distorts the size of regions near the poles.
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