From a total population of 13,694, Griswold has a median age of 44.7. The average age of males, in Griswold, is 41.8 while the average age of females is 46.6. When you compare this to median age of Iowa, Griswold is 6.7 years older.
The median income of individuals, in Griswold, is $25,555 while the average household income is $43,960. When comparing the median income of people living in Griswold to the rest of Iowa, the average income in Griswold is $2,066 less.