Lake Mary is a suburban city in Seminole County, Florida, United States. The population was 13,822 at the 2010 census. Lake Mary is part of the Orlando–Kissimmee–Sanford Metropolitan Statistical Area.Rated by Money magazine as the #4 best place to live in America in the August 2007 issue.GeographyLake Mary is located at .According to the United States Census Bureau, the city has a total area of 9.7sqmi. 8.6sqmi of it is land and 1.1sqmi of it is water.DemographicsAs of the 2000 census, there were 11,458 people, 4,199 households, and 3,271 families residing in the city. The population density was 1,330.8 inhabitants per square mile (513.8/km²). There were 4,351 housing units at an average density of 505.4 per square mile (195.1/km²). The racial makeup of the city was 89.33% White, 3.60% African American, 0.24% Native American, 3.83% Asian, 0.09% Pacific Islander, 1.47% from other races, and 1.42% from two or more races. Hispanic or Latino of any race were 6.22% of the population.There were 4,199 households out of which 38.4% had children under the age of 18 living with them, 70.8% were married couples living together, 6.5% had a female householder with no husband present, and 22.1% were non-families. 16.9% of all households were made up of individuals and 5.8% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.08.