Marion Township is one of the twelve townships of Allen County, Ohio, United States.[3] Located in the northwestern corner of the county, it borders the following townships: Part of the city of Delphos is located in northwestern Marion Township.It is one of twelve Marion Townships statewide.[4] The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1.There is also an elected township fiscal officer,[5] who serves a four-year term beginning on April 1 of the year after the election, which is held in November of the year before the presidential election.