From a total population of 6,486, Saint Johns has a median age of 41. The average age of males, in Saint Johns, is 40.1 while the average age of females is 45.1. When you compare this to median age of Missouri, Saint Johns is 2.9 years older.
The median income of individuals, in Saint Johns, is $20,859 while the average household income is $38,937. When comparing the median income of people living in Saint Johns to the rest of Missouri, the average income in Saint Johns is $5,147 less.