As of the census of 2000, there were 117 people, 50 households, and 42 families residing in the township. The population density was 5.9 people per square mile. There were 67 housing units at an average density of 3.4/sq mi. The racial makeup of the township was 98.29% White, 0.85% from other races, and 0.85% from two or more races. Hispanic or Latino of any race were 0.85% of the population. There were 50 households, out of which 28.0% had children under the age of 18 living with them, 74.0% were married couplesliving together, 6.0% had a female householder with no husband present, and 16.0% were non-families. 16.0% of all households were made up of individuals, and none had someone living alone who was 65 years of age or older. The average household size was 2.34 and the average family size was 2.57. In the township the population was spread out, with 19.7% under the age of 18, 3.4% from 18 to 24, 32.5% from 25 to 44, 32.5% from 45 to 64, and 12.0% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 101.7 males. For every 100 females age 18 and over, there were 108.9 males. The median income for a household in the township was $46,875, and the median income for a family was $48,750. Males had a median income of $35,833 versus $28,750 for females. The per capita income for the township was $23,309. None of the population and none of the families were below the poverty line.
History
was among the investors who in 1864 purchased the South Mountain Iron Company at Pine Grove Furnace, a charcoal-fired iron operation dating to 1764. The specific reason that Cooke Township was created in 1872 out of previously existing Penn Township is unclear. Jay Cooke lost the company in the Panic of 1873, but bought back a major portion of it four years later with a group of investors as the South Mountain Mining and Iron Company., Duluth, Minnesota He was still a co-owner at the time of his death. According to the biography by Oberholtzer, Jay Cooke visited Pine Grove Furnace repeatedly. Cooke fished for trout there—he was an avid outdoorsman throughout his life—and he annually brought gifts such as pocket knives and scissors to the small school established there for the workers' children. Cooke Township continues to this day as a very lightly populated but heavily forested area, while the former center of the iron industry within it is now Pine Grove Furnace State Park. The Pine Grove Furnace was added to the National Register of Historic Places in 1977.
