The median age in Zilwaukee Township, Michigan is 31.5, as per 2021 ACS 5-Year Estimates. Of the total population, 38.64% were under the age of 15, 7.95% aged 15 to 29, 52.27% aged 30 to 64, 1.14% aged 65 to 84, and 0.00% were 85 years of age and older.