The median age in Lake Valley Township, Minnesota is 51.2, as per 2021 ACS 5-Year Estimates. Of the total population, 7.84% were under the age of 15, 16.34% aged 15 to 29, 57.52% aged 30 to 64, 5.23% aged 65 to 84, and 13.07% were 85 years of age and older.