South Kensington is a census-designated place and an unincorporated area in Montgomery County, Maryland, United States.

[3] As an unincorporated area, South Kensington's boundaries are not officially defined.

[4] According to the United States Census Bureau, the place has a total area of 2.1 square miles (5.5 km2), all land.

There were 3,120 housing units at an average density of 1,463.4 per square mile (565.0/km2).

23.0% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.