West Sister Island is an island of the U.S. state of Ohio located in the Western Basin of Lake Erie. The 82 acres (33 ha) island, jointly owned by the United States Coast Guard and the U.S. Fish and Wildlife Service, is Ohio's only designated Wilderness Area, the West Sister Island National Wildlife Refuge.

Jerusalem Township is one of the eleven townships of Lucas County, Ohio, United States. The 2020 census found 2,895 people in the township.