In 2022, the population of Brumley was 74, a 1.37% increase year-by-year from 2021. Previously, in 2021, Brumley's population was 73, an increase of 1.39% compared to a population of 72 in 2020.
The median age in Brumley, MO is 40.5, as per 2021 ACS 5-Year Estimates. Of the total population, 13.56% were under the age of 15, 33.90% aged 15 to 29, 39.83% aged 30 to 64, 12.71% aged 65 to 84, and 0.00% were 85 years of age and older.