Oakville is an unincorporated community and census-designated place (CDP) in south St. Louis County, Missouri, United States.

There were 14,314 housing units at an average density of 898.6 per square mile (347.0/km2).

19.9% of all households were made up of individuals, and 8% had someone living alone who was 65 years of age or older.

17.3% of all households were made up of individuals, and 5.8% had someone living alone who was 65 years of age or older.

[8] There are three Catholic grade schools in Oakville: St. Francis of Assisi, Queen of All Saints, and St. Margaret Mary Alacoque.

St. Louis Community College's South County Education and University Center is located off Meramec Bottom Road at Lemay Ferry Road.

The St. Louis County Library Cliff Cave Branch is in Oakville CDP.