In 2022, the population of Keo was 200, a 1.48% decrease year-by-year from 2021. Previously, in 2021, Keo's population was 203, a decline of 0.00% compared to a population of 203 in 2020.
The median age in Keo, AR is 49.9, as per 2021 ACS 5-Year Estimates. Of the total population, 21.49% were under the age of 15, 12.40% aged 15 to 29, 45.87% aged 30 to 64, 18.18% aged 65 to 84, and 2.07% were 85 years of age and older.