 Limestone Township was named for the limestone boulders dotting its landscape.According to the United States Census Bureau, the township has a total area of 34.6 square miles (89.6 km²), of which 34.3 square miles (88.8 km²) of it is land and 0.3 square miles (0.9 km²) of it (0.95%) is water.As of the census of 2000, there were 159 people, 61 households, and 50 families residing in the township.