From a total population of 7,933, Saint Johns has a median age of 38. The average age of males, in Saint Johns, is 33.6 while the average age of females is 43.9. When you compare this to median age of Michigan, Saint Johns is 1.3 years younger.
The median income of individuals, in Saint Johns, is $23,683 while the average household income is $40,331. When comparing the median income of people living in Saint Johns to the rest of Michigan, the average income in Saint Johns is $2,460 less.