 West-northwest of Cobb Hill is Rose Lake, which through the first half of the 20th century fed tributaries of both rivers, and therefore drained into both the Atlantic Ocean (via the St. Lawrence River) and the Gulf of Mexico.As of the census of 2000, there were 402 people, 161 households, and 115 families residing in the township.The population density was 10.0 people per square mile (3.8/km²).