From a total population of 8,821, Norwalk has a median age of 35.7. The average age of males, in Norwalk, is 34.2 while the average age of females is 37.5. When you compare this to median age of Iowa, Norwalk is 2.3 years younger.
The median income of individuals, in Norwalk, is $31,952 while the average household income is $80,406. When comparing the median income of people living in Norwalk to the rest of Iowa, the average income in Norwalk is $4,331 more.