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

[4] It should not be confused with Concord Township, which the CDP shares much land with, but these areas' boundaries are not identical.

According to the United States Census Bureau, the CDP has a total area of 5.5 square miles (14 km2), all land.

There were 7,079 housing units at an average density of 1,283.9 per square mile (495.7/km2).

24.5% of all households were made up of individuals, and 12.1% had someone living alone who was 65 years of age or older.