Maritime history of Florida
Spain ceded Florida to the United States as part of the Adams–Onís Treaty of 1819, and Florida became a U.S. territory in 1821. Coastal trade with other markets continued to expand and towns like Jacksonville, Pensacola and Tampa became important ports. After becoming a U.S. territory, the federal government began building a series of lighthouses as aids to navigation along the coasts of Florida to mark dangerous headlands, shoals, bars and reefs.
Orange County, Florida
Immediately following the transfer of Florida to the United States in 1821, Governor Andrew Jackson created two counties: Escambia to the west of the Suwannee River and St. Johns to the east. In 1824, the area to the south of St. Johns County was organized as Mosquito County, and Enterprise was named its county seat. This large county took up much of central Florida. It was renamed as Orange County in 1845 when Florida became a state. After population increased in the region, the legislature organized several counties, such as Osceola, Seminole, Lake, and Volusia, from its territory.