Jacksonville is the most populous city in the U.S. state of Florida and the largest city by area in the contiguous United States. It is the seat of Duval County, with which the city government consolidated in 1968. Consolidation gave Jacksonville its great size and placed most of its metropolitan population within the city limits. With an estimated population of 892,062 as of 2017, Jacksonville is also the most populous city in the southeastern United States. The Jacksonville metropolitan area has a population of 1,631,488 and is the fourth largest in Florida.
Jacksonville is centered on the banks of the St. Johns River in the First Coast region of northeast Florida, about 25 miles (40 km) south of the Georgia state line and 340 miles (550 km) north of Miami. The Jacksonville Beaches communities are along the adjacent Atlantic coast. The area was originally inhabited by the Timucua people, and in 1564 was the site of the French colony of Fort Caroline, one of the earliest European settlements in what is now the continental United States. Under British rule, settlement grew at the narrow point in the river where cattle crossed, known as Wacca Pilatka to the Seminole and the Cow Ford to the British. A platted town was established there in 1822, a year after the United States gained Florida from Spain; it was named after Andrew Jackson, the first military governor of the Florida Territory and seventh President of the United States.