Oakville is a census-designated place (CDP) in south St. Louis County, Missouri, United States. The population was 36,301 at the 2020 census. Oakville is 18 miles south of the city of St. Louis and borders the Mississippi and Meramec rivers; the area is part of "South County" (south St. Louis County).
Compare your options: plane, train, bus, car, ferry, bike share, driving and walking directions all in one search.
Learn more about our apps
