| Official Name: | McArthur Township, Logan County, Ohio |
| Settlement Type: | Township |
| Mapsize: | 250px |
| Image Map1: | Map of Logan County Ohio Highlighting McArthur Township.png |
| Mapsize1: | 250px |
| Map Caption1: | Location of McArthur Township in Logan County |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Logan |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 70.55 |
| Area Land Km2: | 70.38 |
| Area Water Km2: | 0.17 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 1920 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Footnotes: | [3] |
| Elevation Ft: | 1191 |
| Coordinates: | 40.4339°N -83.7883°W |
| Area Code: | 937, 326 |
| Blank Name: | FIPS code |
| Blank Info: | 39-45682[4] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1086487 |
McArthur Township is one of the seventeen townships of Logan County, Ohio, United States. As of the 2020 census, the population was 1,920.
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.
McArthur Township was organized in 1823,[5] and was named for Ohio politician Duncan McArthur.[6] It is the only McArthur Township statewide.[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. Two are elected in the year after the presidential election and one is elected in the year before it. 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. Vacancies in the fiscal officership or on the board of trustees are filled by the remaining trustees.
Important highways in McArthur Township include U.S. Routes 33 and 68, and State Routes 117, 274, and 638, along with a small part of State Route 366.