In 2022, the population of Brimson was 48, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Brimson's population was 48, a decline of 0.00% compared to a population of 48 in 2020.
The median age in Brimson, MO is 54.0, as per 2021 ACS 5-Year Estimates. Of the total population, 15.91% were under the age of 15, 15.91% aged 15 to 29, 43.18% aged 30 to 64, 25.00% aged 65 to 84, and 0.00% were 85 years of age and older.