From a total population of 18,267, Marshfield has a median age of 39.3. The average age of males, in Marshfield, is 35.2 while the average age of females is 43.7. When you compare this to median age of Wisconsin, Marshfield is 0.5 years older.
The median income of individuals, in Marshfield, is $26,637 while the average household income is $42,619. When comparing the median income of people living in Marshfield to the rest of Wisconsin, the average income in Marshfield is $1,270 less.