St. Augustine (San Agustín) is a city in the southeastern United States, on the Atlantic coast in northeastern Florida. It is the oldest continuously occupied European-established settlement within the borders of the continental United States.The county seat of St. Johns County, it is part of Florida's First Coast region and the Jacksonville metropolitan area. According to the 2010 census, the city population was 12,975. The United States Census Bureau's 2013 estimate of the city's population was 13,679, while the urban area had a population of 69,173 in 2012.Saint Augustine was founded on September 8, 1565, by Spanish admiral Pedro Menéndez de Avilés, Florida's first governor. He named the settlement "San Agustín," as his ships bearing settlers, troops, and supplies from Spain had first sighted land in Florida eleven days earlier on August 28, the feast day of St. Augustine. The city served as the capital of Spanish Florida for over 200 years, and became the capital of British East Florida when the territory briefly changed hands between Spain and Britain.