In 2022, the population of Menlo was 34, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Menlo's population was 34, a decline of 0.00% compared to a population of 34 in 2020.
The median age in Menlo, KS is 31.5, as per 2021 ACS 5-Year Estimates. Of the total population, 35.00% were under the age of 15, 5.00% aged 15 to 29, 60.00% aged 30 to 64, 0.00% aged 65 to 84, and 0.00% were 85 years of age and older.