Casselberry is a city in Seminole County, Florida, United States. The population was 26,241 at the 2010 census. The city is usually considered linked to the Orlando–Kissimmee–Sanford Metropolitan Statistical Area.
Prior to European settlement in the 19th-century Native American groups inhabited the Seminole County area, including land in present-day Casselberry. A blockhouse known as Fort Concord was constructed on the shores of Lake Concord in 1849 to protect local settlers during conflicts between the Seminole Wars. After theHomestead Act was passed in 1862, settlers began homesteading the land around Lake Concord and the Triplet Chain of Lakes. Annie E. Griffin of Eastman, Georgia platted the area’s first subdivision in 1889 after inheriting the land from her deceased husband.In 1926, Hibbard Casselberry of Winnetka, Illinois was visiting his wife’s aunt in nearby Winter Park, Florida when he met Gordon Barnett and signed on as his exclusive sales agent for Fern Park Estates. Casselberry and Barnett split soon after but Casselberry purchased land surrounding Fern Park Estates and began platting his own subdivision: Winter Park Ferneries. The area became known as Fern Park and a post office was established under that name in 1928. Hibbard Casselberry convinced the residents of Fern Park that the best way to avoid property taxes was to incorporate their own tax-free town. A town meeting was held on October 10, 1940 where the tax-free Town of Casselberry was officially incorporated.