From a total population of 12,940, Saint Marys has a median age of 47. The average age of males, in Saint Marys, is 43.9 while the average age of females is 48.9. When you compare this to median age of Pennsylvania, Saint Marys is 6.6 years older.
The median income of individuals, in Saint Marys, is $25,709 while the average household income is $48,842. When comparing the median income of people living in Saint Marys to the rest of Pennsylvania, the average income in Saint Marys is $3,203 less.