From a total population of 16,732, Gem County has a median age of 43.8. The average age of males, in Gem County, is 40.9 while the average age of females is 45.9. When you compare this to median age of Idaho, Gem County is 8.6 years older.
The median income of individuals, in Gem County, is $20,623 while the average household income is $41,969. When comparing the median income of people living in Gem County to the rest of Idaho, the average income in Gem County is $2,464 less.