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 Lewis . . .
- was 49.3 in 2020, compared to 42.5 in 2000, 36.6 in 1990 and 31.6 in 1980;
- was 49.3 in 2020 compared to 37.5 in Idaho;
- ranked 7th - from highest to lowest - out of Idaho's 44 counties in 2020.