In 2022, the population of Mercer was 113, a 11.88% increase year-by-year from 2021. Previously, in 2021, Mercer's population was 101, an increase of 12.22% compared to a population of 90 in 2020.
The median age in Mercer, ND is 47.2, as per 2021 ACS 5-Year Estimates. Of the total population, 12.24% were under the age of 15, 0.00% aged 15 to 29, 74.49% aged 30 to 64, 10.20% aged 65 to 84, and 3.06% were 85 years of age and older.