Correction for the size of Mackinac Island
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How big is 3,090 acres?
It's about one-and-one-tenth times as big as Mackinac Island
The size of Mackinac Island is about 2,794 acres.
(Michigan)
Mackinac Island measures 2,794.80 acres in total land area. The island is located in Lake Huron and is known as a historically-cultured tourist destination and summer colony, home to the well-known Victorian Grand Hotel.