 Marble Township was named for the boulders dotting its landscape, which despite the name, are composed of limestone not marble.According to the United States Census Bureau, the township has a total area of 36.5 square miles (94.6 km²), of which 36.5 square miles (94.4 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.22%) is water.As of the census of 2000, there were 195 people, 72 households, and 59 families residing in the township.