McArthur Township is one of the seventeen townships of Logan County, Ohio, United States.

Located in the northern part of the county, it borders the following townships: The village of Huntsville is located in central McArthur Township, and the unincorporated community of Northwood is located in the township's northeast, along the border with Richland Township.

[7] 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, 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.

Important highways in McArthur Township include U.S.