 According to the United States Census Bureau, the township has a total area of 48.8 square miles (126.3 km²), of which, 48.4 square miles (125.4 km²) of it is land and 0.4 square miles (0.9 km²) of it (0.74%) is water.Middlebury Township is bordered by Farmington Township to the north, Tioga and Richmond Townships to the east, Charleston and Delmar Township to the south and Chatham Township to the west.As of the census of 2000, there were 1,221 people, 477 households, and 352 families residing in the township.