In 2022, the population of Gem was 96, a 1.03% decrease year-by-year from 2021. Previously, in 2021, Gem's population was 97, a decline of 0.00% compared to a population of 97 in 2020.
The median age in Gem, KS is 35.4, as per 2021 ACS 5-Year Estimates. Of the total population, 20.51% were under the age of 15, 18.80% aged 15 to 29, 37.61% aged 30 to 64, 23.08% aged 65 to 84, and 0.00% were 85 years of age and older.