From a total population of 16,555, Clay County has a median age of 42.1. The average age of males, in Clay County, is 40.4 while the average age of females is 44.2. When you compare this to median age of Iowa, Clay County is 4.1 years older.
The median income of individuals, in Clay County, is $29,138 while the average household income is $49,438. When comparing the median income of people living in Clay County to the rest of Iowa, the average income in Clay County is $1,517 more.