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As of the 2010 United States Census, Sumner County, located in the Sunflower State, had a total population of 23,763 people.
From a total population of 23,763, Sumner County has a median age of 40.5. The average age of males, in Sumner County, is 39.1 while the average age of females is 41.6. When you compare this to median age of Kansas, Sumner County is 4.5 years older.
The median income of individuals, in Sumner County, is $23,670 while the average household income is $50,310. When comparing the median income of people living in Sumner County to the rest of Kansas, the average income in Sumner County is $3,697 less.