The median age in Ortonville Township, Minnesota is 42.8, as per 2021 ACS 5-Year Estimates. Of the total population, 23.19% were under the age of 15, 20.29% aged 15 to 29, 42.03% aged 30 to 64, 11.59% aged 65 to 84, and 2.90% were 85 years of age and older.