From a total population of 4,428, Shelley has a median age of 25.3. The average age of males, in Shelley, is 25.2 while the average age of females is 25.5. When you compare this to median age of Idaho, Shelley is 9.9 years younger.
The median income of individuals, in Shelley, is $15,820 while the average household income is $50,481. When comparing the median income of people living in Shelley to the rest of Idaho, the average income in Shelley is $7,267 less.