Chesterfield is a city in St. Louis County, Missouri, United States, and a Western suburb of St. Louis. As of the 2010 census, the population was 47,484, making it the state's fourteenth-largest city. The broader valley of Chesterfield was originally referred to as "Gumbo Flats", derived from its soil, which though very rich and silty, became like a gumbo when wet. Geographically, Chesterfield is half the size of St. Louis.
Chesterfield is located about 25 miles (40 km) west of St. Louis, Missouri. According to the United States Census Bureau, the city has a total area of 33.52 square miles (86.82 km²), of which, 31.78 square miles (82.31 km²) is land and 1.74 square miles (4.51 km²) is water.
As of the census of 2010, there were 47,484 people, 19,224 households, and 13,461 families residing in the city. The population density was 1,494.1 inhabitants per square mile (576.9/km²). There were 20,393 housing units at an average density of 641.7 per square mile (247.8/km²). The racial makeup of the city was 86.5% White, 2.6% African American, 0.2% Native American, 8.6% Asian, 0.7% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 2.8% of the population.
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