Chesterfield is a city located in St. Louis County Missouri. With a 2020 population of 47,492, it is the 14th largest city in Missouri and the 836th largest city in the United States . Chesterfield is currently declining at a rate of -0.05% annually but its population has increased by 0.02% since the most recent census, which recorded a population of 47,484 in 2010. Chesterfield reached it's highest population of 47,742 in 2015. Spanning over 34 miles, Chesterfield has a population density of 1,490 people per square mile.
The average household income in Chesterfield is $153,552 with a poverty rate of 4.18%. The median rental costs in recent years comes to $1,200 per month, and the median house value is $379,800. The median age in Chesterfield is 46.5 years, 45.1 years for males, and 48.2 years for females.