Atlanta is about 4.9 times bigger than Santa Ana.

Santa Ana (map shows its 60 named neighbourhoods; the area covers the whole city) is approximately 71 sq km, while Atlanta (map shows its 114 named neighbourhoods; the area covers the whole city) is approximately 350 sq km, making Atlanta 394% larger than Santa Ana.
Tip: This to-scale comparison of Santa Ana vs. Atlanta uses the Mercator projection, which distorts the size of regions near the poles.
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