In 2022, the population of Alamo was 51, a 1.92% decrease year-by-year from 2021. Previously, in 2021, Alamo's population was 52, a decline of 3.70% compared to a population of 54 in 2020.
The median age in Alamo, ND is 42.5, as per 2021 ACS 5-Year Estimates. Of the total population, 35.71% were under the age of 15, 0.00% aged 15 to 29, 53.57% aged 30 to 64, 3.57% aged 65 to 84, and 7.14% were 85 years of age and older.