In 2022, the population of Radium was 23, a 4.17% decrease year-by-year from 2021. Previously, in 2021, Radium's population was 24, a decline of 0.00% compared to a population of 24 in 2020.
The median age in Radium, KS is 64.5, as per 2021 ACS 5-Year Estimates. Of the total population, 0.00% were under the age of 15, 0.00% aged 15 to 29, 54.55% aged 30 to 64, 36.36% aged 65 to 84, and 9.09% were 85 years of age and older.