St. Augustine is a city in St. Johns County, Florida, in the United States. It is the oldest continuously occupied European-established city in the continental United States. St. Augustine lies in a region of Florida known as The First Coast, which extends from Amelia Island in the north, south to Jacksonville, St. Augustine and Palm Coast. According to the 2000 census, the city population was 11,592; in 2004, the population estimated by the U.S. Census Bureau was 12,157. It is the county seat of St. Johns County. St. Augustine apartments for rent comparison page shows most up to date rent information on St. Augustine apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.