Lake Mystic is an unincorporated community and census-designated place in Liberty County, Florida, United States.
Its population was 500[needs update] at the 2010 census.
[1] According to the U.S. Census Bureau, the community has an area of 4.708 square miles (12.19 km2); 4.538 square miles (11.75 km2) of its area is land, and 0.170 square miles (0.44 km2) is water.
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