From a total population of 25,850, Marshalltown has a median age of 35.9. The average age of males, in Marshalltown, is 34.5 while the average age of females is 36.7. When you compare this to median age of Iowa, Marshalltown is 2.1 years younger.
The median income of individuals, in Marshalltown, is $22,512 while the average household income is $48,750. When comparing the median income of people living in Marshalltown to the rest of Iowa, the average income in Marshalltown is $5,109 less.