From a total population of 605,762, Jefferson County has a median age of 37.2. The average age of males, in Jefferson County, is 35.7 while the average age of females is 38.6. When you compare this to median age of Kentucky, Jefferson County is 1.1 years younger.
The median income of individuals, in Jefferson County, is $26,621 while the average household income is $44,806. When comparing the median income of people living in Jefferson County to the rest of Kentucky, the average income in Jefferson County is $2,880 more.