In 2022, the population of Iuka was 149, a 1.32% decrease year-by-year from 2021. Previously, in 2021, Iuka's population was 151, an increase of 0.67% compared to a population of 150 in 2020.
The median age in Iuka, KS is 60.4, as per 2021 ACS 5-Year Estimates. Of the total population, 13.17% were under the age of 15, 15.61% aged 15 to 29, 29.76% aged 30 to 64, 41.46% aged 65 to 84, and 0.00% were 85 years of age and older.