Longwood is a city in Seminole County, Florida, United States. The population was 13,657 at the 2010 census. It is part of the Orlando–Kissimmee–Sanford, Florida Metropolitan Statistical Area.
In the city, the population was spread out with 25.2% under the age of 18, 7.1% from 18 to 24, 30.4% from 25 to 44, 25.0% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 93.6 males. For every 100 females age 18 and over, there were 89.0 males.