From a total population of 24,899, Plymouth County has a median age of 42.1. The average age of males, in Plymouth County, is 41.3 while the average age of females is 42.7. When you compare this to median age of Iowa, Plymouth County is 4.1 years older.
The median income of individuals, in Plymouth County, is $27,848 while the average household income is $57,583. When comparing the median income of people living in Plymouth County to the rest of Iowa, the average income in Plymouth County is $227 more.