[3] It contains historic Forestville, which is now a living history museum within Forestville/Mystery Cave State Park.

Forestville Township was organized in 1855, and named for Forest Henry, an early settler.

[4] According to the United States Census Bureau, the township has a total area of 36.2 square miles (94 km2), all land.

There were 164 housing units at an average density of 4.5 per square mile (1.7/km2).

20.7% of all households were made up of individuals, and 6.0% had someone living alone who was 65 years of age or older.