From a total population of 2,502, Marengo has a median age of 36.6. The average age of males, in Marengo, is 30.7 while the average age of females is 38.1. When you compare this to median age of Iowa, Marengo is 1.4 years younger.
The median income of individuals, in Marengo, is $20,730 while the average household income is $44,083. When comparing the median income of people living in Marengo to the rest of Iowa, the average income in Marengo is $6,891 less.