Size comparison

compared to

Mackinac Island is about 13 times smaller than San Francisco.

San Francisco (including the city proper only) is approximately 121 sq km, while Mackinac Island is approximately 9.54 km² (3.68 sq mi), making Mackinac Island 7.89% the size of San Francisco.
Tip: This to-scale comparison of San Francisco vs. Mackinac Island uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Mackinac Island vs. San Francisco

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See Mackinac Island on top of San Francisco
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