The median age in Poplar River Township, Minnesota is 64.8, as per 2021 ACS 5-Year Estimates. Of the total population, 8.70% were under the age of 15, 11.59% aged 15 to 29, 30.43% aged 30 to 64, 49.28% aged 65 to 84, and 0.00% were 85 years of age and older.