Summit Township covers an area of 36 square miles (93.2 km2).
Communities
The township contains the following settlements:
Ghost town of Watchorn. It was a former oil boom community during the 1910s and 1920s. It was located at the intersection of Timber Rd and 60th St (approximately 5 miles (8.0 km) east of Peabody).
Cemeteries
The township contains the following cemeteries:[3]
Summit Township Cemetery (a.k.a. United Brethren Cemetery), located in Section 23 T22S R4E. The church was closed and demolished in the 2010s.
Whitewater Center Cemetery (a.k.a. Stone Church Cemetery), located in Section 28 T22S R4E. The church is across the road.