Lake Hart is a census-designated place and an unincorporated area in Orange County, Florida, United States.

[7] As of the census[3] of 2000, there were 557 people, 227 households, and 155 families residing in the CDP.

There were 227 households, out of which 23.8% had children under the age of 18 living with them, 59.5% were married couples living together, 5.7% had a female householder with no husband present, and 31.3% were non-families.

21.6% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.

None of the families and 6.9% of the population were living below the poverty line, including no under eighteens and none of those over 64.