Lake Fern is an unincorporated community in Hillsborough County, Florida, United States.

Although a separate community, it is a part of the census-designated place (CDP) of Keystone.

[2] In 2000, it was part of the Citrus Park-Fern Lake [sic] census county division (CCD), which recorded an estimate population of 117,574 in 2007.

[5] The community of Lake Fern is served by Hillsborough County Public Schools.

This Hillsborough County, Florida location article is a stub.