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 Gem . . .
- was 43.9 in 2019, compared to 37.5 in 2000, 36.0 in 1990 and 31.3 in 1980;
- was 43.9 in 2019 compared to 36.9 in Idaho;
- ranked 17th - from highest to lowest - out of Idaho's 44 counties in 2019.