 Forest Township occupies the southeastern corner of Cheboygan County and is bordered by Presque Isle County to the east and Montmorency County to the south.According to the United States Census Bureau, the township has a total area of , of which is land and , or 1.34%, is water.As of the census of 2000, there were 1,080 people, 431 households, and 318 families residing in the township.