Lake Mary is a city in Seminole County, Florida, United States. The population was 11,458 at the 2000 census. As of 2006, the population recorded by the U.S. Census Bureau is 14,718. Lake Mary is part of the Orlando-Kissimmee Metropolitan Area. Lake Mary apartments for rent comparison page shows most up to date rent information on Lake Mary apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.