In 2022, the population of Mahaska was 42, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Mahaska's population was 42, a decline of 0.00% compared to a population of 42 in 2020.
The median age in Mahaska, KS is 50.5, as per 2021 ACS 5-Year Estimates. Of the total population, 8.57% were under the age of 15, 15.71% aged 15 to 29, 61.43% aged 30 to 64, 11.43% aged 65 to 84, and 2.86% were 85 years of age and older.