Ingalls is an unincorporated community in Menominee County, Michigan, United States. Ingalls is located in Mellen Township along U.S. Highway 41, 2.5 miles south of Stephenson. Ingalls has a post office with ZIP code 49848.Thomas Caldwell first settled Ingalls in 1858. The community was named after Eleazer S. Ingalls, a judge who organized Menominee County, in 1863. A station on the Chicago and North Western Railway opened in Ingalls in 1872. A post office opened in Ingalls on June 20, 1879; Louis Dobeas was the first postmaster.