St. Charles County is lying in the state of Missouri. With a land mass of 592 square miles, St. Charles County is one of the smaller counties in the state, while in population it is at the top with 28,388 inhabitants. St. Charles County's population density of urban makes it one of the least densely populated areas in the state. The county's largest city is Saint Charles, with a population of 126,094.

St. Charles County is one of the most affluent regions in the state. The median income for St. Charles County residents is $57,305, putting the area in at the top of all counties in Missouri. As a reflection this, the average house value in St. Charles County is $124,609, well above the state average of $90,296.    Continued below...