 Spruce Valley Township was organized in 1888, and named for the spruce groves within its borders.According to the United States Census Bureau, the township has a total area of 36.3 square miles (94.1 km²), of which 36.3 square miles (94.0 km²) of it is land and 0.03% is water.As of the census of 2000, there were 238 people, 94 households, and 73 families residing in the township.