The median income for a household in the county was $57,258, and the median income for a family was $64,415.
Males had a median income of $44,528 versus $29,405 for females. The per capita income for the county was $23,592.
4.00% of the population and 2.80% of families were below the poverty line. Out of the total people living in poverty, 4.90% are under the age of 18 and 5.10% are 65 or older.
There were 101,663 households out of which 40.50% had children under the age of 18 living with them, 63.20% were married couples living together, 9.20% have a woman whose husband does not live with her, and 24.20% were non-families. 19.40% of all households were made up of individuals and 5.90% had someone living alone who was 65 years of age or older. The average household size was 2.76 and the average family size was 3.18.
Read more statistics on St. Charles county at answers.com.