The total population of Marmarth is estimated to be 93 with 56 males (60.22%) and 37 females (39.78%). There are 19 less females than males in Marmarth.
In 2022, the population of Marmarth was 97, a 2.02% decrease year-by-year from 2021. Previously, in 2021, Marmarth's population was 99, a decline of 1.00% compared to a population of 100 in 2020.
The median age in Marmarth, ND is 40.7, as per 2021 ACS 5-Year Estimates. Of the total population, 25.86% were under the age of 15, 6.03% aged 15 to 29, 50.00% aged 30 to 64, 17.24% aged 65 to 84, and 0.86% were 85 years of age and older.