Deltona is a city in Volusia County, Florida, United States. It is located on the northern shore of Lake Monroe. As of the 2020 census, the city population was 93,692. It is a principal city of the Deltona–Daytona Beach–Ormond Beach metropolitan area, which was home to an estimated 685,344 people in 2021. It is the second largest city in the Greater Orlando combined statistical area.