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

They bought 1,920 acres (3 square miles) of land - more than the area of present-day Sappington.

The descendants of the family eventually populated the area, and parts of present-day Crestwood and Sunset Hills.

[6] The house of Thomas Sappington, one of the original settlers, still exists and is maintained by the City of Crestwood.

There were 3,530 housing units at an average density of 1,380.8 per square mile (533.1/km2).

36.5% of all households were made up of individuals, and 19.7% had someone living alone who was 65 years of age or older.

37.6% of all households were made up individuals and 19.5% had someone living alone who was 65 years of age or older.

About 5.0% of families and 4.9% of the population were below the poverty line, including 6.6% of those under the age of 18 and 7.6% of those age 65 and over[10] The school district Lindbergh Schools serves Sappington as well as the surrounding areas.