Median age is the age at which half the population is younger and half is older. A lower median age indicates a relatively younger population, while a higher median age indicates a relatively older population.
The median age in Madison . . .
- was 23.3 in 2019, compared to 20.7 in 2000, 20.0 in 1990 and 19.9 in 1980;
- was 23.3 in 2019 compared to 36.9 in Idaho;
- ranked 44th - from highest to lowest - out of Idaho's 44 counties in 2019.