Milmine is an unincorporated community in Cerro Gordo Township, Piatt County, Illinois, United States.Milmine is located at 39°54′27″N 088°39′01″W / 39.90750°N 88.65028°W / 39.90750; -88.65028 at an elevation of 712 feet.PiattCountyIL-geo-stub