Franklin Township is one of the nine townships of Marion County, Indiana, United States. Located in the southeast corner of the county, it has been subsumed into the city of Indianapolis along with most of the rest of the county. It contains the communities of Acton, Wanamaker, and the eastern portion of the excluded city of Beech Grove.

Marion County is located in the U.S. state of Indiana. The 2020 United States census reported a population of 977,203, making it the most populous county in the state and the 54th-most populous county in the U.S. Indianapolis is the county seat, the state capital, and most populous city. Marion County is consolidated with Indianapolis through an arrangement known as Unigov. Marion County is the central county of the Indianapolis–Carmel–Anderson MSA in Central Indiana.