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As of the 2010 United States Census, Saint Charles County, located in the Show-Me State, had a total population of 81,978 people.
From a total population of 81,978, Saint Charles County has a median age of 35. The average age of males, in Saint Charles County, is 33.9 while the average age of females is 36.3. When you compare this to median age of Missouri, Saint Charles County is 3.1 years younger.
The median income of individuals, in Saint Charles County, is $31,809 while the average household income is $78,634. When comparing the median income of people living in Saint Charles County to the rest of Missouri, the average income in Saint Charles County is $5,803 more.