 Nelson Park Township was organized in 1884, and named for James Nelson, a pioneer settler.According to the United States Census Bureau, the township has a total area of 36.2 square miles (93.7 km²), of which 36.1 square miles (93.6 km²) of it is land and 0.1 square miles (0.1 km²) of it (0.14%) is water.As of the census of 2000, there were 158 people, 56 households, and 44 families residing in the township.