On July 21, 1821, two counties formed Florida: Escambia to the west and St. Johns to the east. In 1824, the area to the south of St. Johns County was designated Mosquito County, with its seat at Enterprise. The county's na… See more

According to the U.S. Census Bureau, the county has an area of 345 square miles (890 km ), of which 309 square miles (800 km ) is land and 36 square miles (93 km ) (10.4%) is water. It is Florida's fourth-smallest co… See more

As of the 2020 United States census, there were 470,856 people, 178,094 households, and 120,049 families residing in the county.
As of the census of 2000, there were 365,196 people, 139,572 households, and 97,281 fam… See more

Seminole County is part of the strongly Republican belt of central and southwest Florida that was the first portion of the state to politically distance itself from the "Solid South"; until Joe Biden carried the county in 2020, the l… See more

The library system was founded in 1978 by the Seminole County Board of County Commissioners. It contains 500,000 volumes and has a circulation of 2.5 million books annually. There are five branches, located in t… See more