San Carlos Park is a census-designated place (CDP) in Lee County, Florida, United States. The population was 18,563 at the 2020 census. It is part of the Cape Coral-Fort Myers, Florida Metropolitan Statistical Area. Geography San Carlos Park is located in south-central Lee County at (26.474458, -81.815467). It is an unincorporated community, bordered to the south by the village of Estero and to the east by the Three Oaks CDP. U.S. Route 41 forms the western edge of San Carlos Park, leading north to Fort Myers, the county seat, and south through Estero and Bonita Springs to Naples. According to the United States Census Bureau, the San Carlos Park CDP has a total area of , of which are land and , or 4.93%, are water. The land in the CDP drains west via Mullock Creek to Estero Bay, an estuary connected to the Gulf of Mexico. Demographics At the 2000 census there were 16,317 people, 5,901 households, and 4,449 families in the CDP. The population density was . There were 6,580 housing units at an average density of . The racial makup of the CDP was 93.84% White, 1.26% African American, 0.34% Native American, 0.70% Asian, 0.01% Pacific Islander, 2.31% from other races, and 1.54% from two or more races. Hispanic or Latino of any race were 8.14%. Of the 5,901 households 42.5% had children under the age of 18 living with them, 58.2% were married couples living together, 11.3% had a female householder with no husband present, and 24.6% were non-families. 16.5% of households were one person and 4.4% were one person aged 65 or older. The average household size was 2.77 and the average family size was 3.09. The age distribution was 29.3% under the age of 18, 6.9% from 18 to 24, 36.7% from 25 to 44, 18.5% from 45 to 64, and 8.7% 65 or older. The median age was 34 years. For every 100 females, there were 102.3 males. For every 100 females age 18 and over, there were 98.6 males. The median household income was $45,870 and the median family income was $48,740. Males had a median income of $31,768 versus $25,541 for females. The per capita income for the CDP was $19,022. About 6.1% of families and 8.0% of the population were below the poverty line, including 8.8% of those under age 18 and 7.2% of those age 65 or over. History