From a total population of 18,932, Jefferson County has a median age of 43.5. The average age of males, in Jefferson County, is 42.6 while the average age of females is 44.4. When you compare this to median age of Kansas, Jefferson County is 7.5 years older.
The median income of individuals, in Jefferson County, is $26,259 while the average household income is $56,531. When comparing the median income of people living in Jefferson County to the rest of Kansas, the average income in Jefferson County is $1,108 less.