From a total population of 134,886, Marathon County has a median age of 40.2. The average age of males, in Marathon County, is 38.9 while the average age of females is 41.4. When you compare this to median age of Wisconsin, Marathon County is 1.4 years older.
The median income of individuals, in Marathon County, is $27,723 while the average household income is $53,779. When comparing the median income of people living in Marathon County to the rest of Wisconsin, the average income in Marathon County is $184 less.