[2] The Wilson's Mill Covered Bridge was listed on the National Register of Historic Places in 1979.

[4] According to the United States Census Bureau, the township has a total area of 20.5 square miles (53 km2), all of it land.

There were 370 housing units at an average density of 18.0 per square mile (6.9/km2).

The racial makeup of the township was 98.89% White, 0.40% African American, and 0.71% from two or more races.

[5] 13% of Hopewell Township reported Scotch-Irish ancestry, the second largest percentage for any populated place in the United States.