 Lake Winola is located in Overfield Township.According to the United States Census Bureau, the township has a total area of 10.2 square miles (26.4 km²), of which, 9.9 square miles (25.6 km²) of it is land and 0.3 square miles (0.9 km²) of it (3.24%) is water.At the 2000 census there were 1,532 people, 612 households, and 438 families living in the township.