DeBary is a city in Volusia County, Florida, United States, on the northern shore of the St. Johns River near Lake Monroe. According to the 2010 U.S. Census, the city had a population of 19,320. It is part of the DeltonaDaytona BeachOrmond Beach Metropolitan Statistical Area, which was home to 494,593 people in 2010. The TimucuanIndians once lived in the vicinity of Lake Monroe, where the domain of Chief Utina extended to just north of Lake George. They hunted, fished and gathered plants and berries from the forest. By 1760, however, the Timucua had disappeared and been replaced by the Seminole tribe from Alabama and Georgia. Florida was acquired from Spain in 1821, but the Seminole Wars would delay settlement. In 1866, Elijah Watson of Enterprise sold land to Oliver and Amanda Arnett on the northern shore of the St. Johns River at Lake Monroe, where they built a house.