Marcellus, MI has a population of 1,039 and is the 14,916th largest city in the United States. The population density is 1,778 per sq mi which is 1663% higher than the Michigan average and 1863% higher than the national average. The median age in Marcellus is 34 which is approximately 13% lower than the Michigan average of 40. In Marcellus, 56% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 76% of Marcellus residents were born in Michigan, 23% were born out of state, 1% were born outside of the United States and 0% were foreign born.