From a total population of 67,535, Marquette County has a median age of 39.3. The average age of males, in Marquette County, is 38.6 while the average age of females is 40.1. When you compare this to median age of Michigan, Marquette County is roughly the same.
The median income of individuals, in Marquette County, is $23,760 while the average household income is $45,066. When comparing the median income of people living in Marquette County to the rest of Michigan, the average income in Marquette County is $2,383 less.