The total population of Keystone is estimated to be 99 with 22 males (22.22%) and 77 females (77.78%). There are 55 more females than males in Keystone.
In 2022, the population of Keystone was 160, a 4.76% decrease year-by-year from 2021. Previously, in 2021, Keystone's population was 168, a decline of 2.89% compared to a population of 173 in 2020.
The median age in Keystone, WV is 56.5, as per 2021 ACS 5-Year Estimates. Of the total population, 7.35% were under the age of 15, 7.35% aged 15 to 29, 67.65% aged 30 to 64, 5.88% aged 65 to 84, and 11.76% were 85 years of age and older.