Twin Lakes is an unincorporated community and census-designated place in Twin Lakes and Sherman townships in Calhoun County, Iowa, United States. As of the 2020 census it had a population of 316. The CDP consists of lakefront communities surrounding two lakes, North Twin Lake and South Twin Lake. The lakes, which do not have a discernible sur…Twin Lakes is an unincorporated community and census-designated place in Twin Lakes and Sherman townships in Calhoun County, Iowa, United States. As of the 2020 census it had a population of 316. The CDP consists of lakefront communities surrounding two lakes, North Twin Lake and South Twin Lake. The lakes, which do not have a discernible surface outlet, are part of the North Raccoon River watershed, a tributary of the Des Moines River. Twin Lakes State Park occupies the surface area of the two lakes plus small portions of the shoreline.
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