From a total population of 7,184, Denison has a median age of 34.3. The average age of males, in Denison, is 32.3 while the average age of females is 36.8. When you compare this to median age of Iowa, Denison is 3.7 years younger.
The median income of individuals, in Denison, is $19,710 while the average household income is $45,366. When comparing the median income of people living in Denison to the rest of Iowa, the average income in Denison is $7,911 less.