From a total population of 3,631, Willow Lake has a median age of 44.6. The average age of males, in Willow Lake, is 43 while the average age of females is 46.8. When you compare this to median age of South Dakota, Willow Lake is 7.8 years older.
The median income of individuals, in Willow Lake, is $28,434 while the average household income is $49,016. When comparing the median income of people living in Willow Lake to the rest of South Dakota, the average income in Willow Lake is $2,123 more.