From a total population of 49,488, Polk County has a median age of 32.9. The average age of males, in Polk County, is 31.5 while the average age of females is 33.6. When you compare this to median age of Iowa, Polk County is 5.1 years younger.
The median income of individuals, in Polk County, is $33,555 while the average household income is $75,069. When comparing the median income of people living in Polk County to the rest of Iowa, the average income in Polk County is $5,934 more.