From a total population of 9,591, Storm Lake has a median age of 30. The average age of males, in Storm Lake, is 29.3 while the average age of females is 32.1. When you compare this to median age of Iowa, Storm Lake is 8.0 years younger.
The median income of individuals, in Storm Lake, is $19,660 while the average household income is $44,164. When comparing the median income of people living in Storm Lake to the rest of Iowa, the average income in Storm Lake is $7,961 less.