In 2022, the population of Oto was 71, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Oto's population was 71, a decline of 1.39% compared to a population of 72 in 2020.
The median age in Oto, IA is 50.5, as per 2021 ACS 5-Year Estimates. Of the total population, 11.90% were under the age of 15, 23.81% aged 15 to 29, 30.95% aged 30 to 64, 32.14% aged 65 to 84, and 1.19% were 85 years of age and older.