From a total population of 129,913, Johnson County has a median age of 33.8. The average age of males, in Johnson County, is 32.8 while the average age of females is 34.8. When you compare this to median age of Kansas, Johnson County is 2.2 years younger.
The median income of individuals, in Johnson County, is $31,724 while the average household income is $76,519. When comparing the median income of people living in Johnson County to the rest of Kansas, the average income in Johnson County is $4,357 more.