In 2022, the population of Opheim was 73, a 1.35% decrease year-by-year from 2021. Previously, in 2021, Opheim's population was 74, a decline of 0.00% compared to a population of 74 in 2020.
The median age in Opheim, MT is 54.2, as per 2021 ACS 5-Year Estimates. Of the total population, 0.00% were under the age of 15, 22.50% aged 15 to 29, 65.00% aged 30 to 64, 11.25% aged 65 to 84, and 1.25% were 85 years of age and older.