Marenisco is an unincorporated community and census-designated place in Marenisco Township, Gogebic County, Michigan, in the United States. As of the 2010 census, the CDP had a population of 254, out of a total population in the township of 1,727. The name of the community and the township was formed by combining the first three letters from Mary Enid Scott, the wife of E. H. Scott, a timber producer.