In 2022, the population of Sibley was 20, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Sibley's population was 20, a decline of 0.00% compared to a population of 20 in 2020.
The median age in Sibley, ND is 59.8, as per 2021 ACS 5-Year Estimates. Of the total population, 9.38% were under the age of 15, 3.12% aged 15 to 29, 59.38% aged 30 to 64, 25.00% aged 65 to 84, and 3.12% were 85 years of age and older.