St. Augustine South, Florida

St. Augustine South is a census-designated place (CDP) in St. Johns County, Florida, United States. The population was 5,066 at the 2020 census, up from 4,998 at the 2010 census. It is part of the Jacksonville, Florida Metropolitan Statistical Area.

Geography
St. Augustine South is located at 29.84361°N, -81.315°W (29.843744, -81.314964).

According to the United States Census Bureau, the CDP has a total area of 1.7 square miles (4.5 km$2$), all land.

Demographics
At the 2000 census there were 5,035 people, 1,929 households, and 1,462 families in the CDP. The population density was 2,927.3 PD/sqmi. There were 1,993 housing units at an average density of 1,158.7 /sqmi. The racial makeup of the CDP was 96.80% White, 0.95% African American, 0.26% Native American, 1.11% Asian, 0.02% Pacific Islander, 0.14% from other races, and 0.71% from two or more races. Hispanic or Latino of any race were 2.82%. Of the 1,929 households 31.9% had children under the age of 18 living with them, 63.6% were married couples living together, 8.8% had a female householder with no husband present, and 24.2% were non-families. 18.2% of households were one person and 8.4% were one person aged 65 or older. The average household size was 2.60 and the average family size was 2.95.

The age distribution was 24.0% under the age of 18, 6.3% from 18 to 24, 27.7% from 25 to 44, 26.3% from 45 to 64, and 15.7% 65 or older. The median age was 41 years. For every 100 females, there were 91.7 males. For every 100 females age 18 and over, there were 89.2 males.

The median household income was $52,090 and the median family income was $56,592. Males had a median income of $36,123 versus $25,434 for females. The per capita income for the CDP was $21,883. About 2.3% of families and 4.1% of the population were below the poverty line, including 3.4% of those under age 18 and 2.9% of those age 65 or over.

Education
It is in the St. Johns County School District.

Zoned schools include Osceola Elementary School, - See index of maps R. J. Murray Middle School,  - See index of maps and Pedro Menendez High School.