Concord is a census-designated place (CDP) in St. Louis County, Missouri, United States. The population was 16,421 at the 2010 census. It should not be confused with Concord Township or Concord Village; the CDP shares much land with both, but these areas' boundaries are not identical.GeographyConcord is located at . The CDP is shaped roughly like a figure 8, with the southern loop larger and more rounded than the angular northern loop.According to the United States Census Bureau, the CDP has a total area of 5.5sqmi, all of it land.Concord is mostly bounded by highways—by Interstate 255, U.S. Route 67, Route 21, and Route 30 . Interstate 270 bisects the CDP's southern node.Adjacent areas Sappington CDP (west) Grantwood Village (north) Affton CDP (northeast) Lakeshire (northeast) Green Park (east) Mehlville CDP (east)
