 Ray Caldwell, baseball star of the early 20th century, was also born in Corydon.According to the United States Census Bureau, the township has a total area of , of which, of it is land and of it (0.60%) is water, almost all of that coming from the Allegheny Reservoir.As of the census of 2000, there were 301 people, 122 households, and 85 families residing in the township.