Chesterfield, Missouri

Chesterfield, Missouri
From top left: Butterfly House, Faust Park, Residential area, Old Chesterfield
Location of Chesterfield, Missouri
Coordinates: 38°39′32″N 90°34′49″W / 38.65889°N 90.58028°W / 38.65889; -90.58028
CountryUnited States
StateMissouri
CountySt. Louis
Incorporated1988
Government
  MayorBob Nation
Area
  Total
33.84 sq mi (87.64 km2)
  Land31.84 sq mi (82.45 km2)
  Water2.00 sq mi (5.19 km2)
Elevation
515 ft (157 m)
Population
 (2020)
  Total
49,999
  Density1,570.57/sq mi (606.40/km2)
Time zoneUTC−6 (Central (CST))
  Summer (DST)UTC−5 (CDT)
Zip code
63005, 63017
Area code(s)314, 636
FIPS code29-13600
GNIS feature ID2393821
Websitechesterfield.mo.us

Chesterfield is a city in St. Louis County, Missouri, United States. It is a western suburb of St. Louis. As of the 2020 census, the population was 49,999, making it the state's 14th most populous city. The broader valley of Chesterfield was originally referred to as "Gumbo Flats", derived from its soil, which though very rich and silty, resembled gumbo when wet.