Madison Township is one of thirteen townships in Butler County, Ohio, United States. Located in northeastern Butler County, just west of Middletown, it had a population of 8,556 people as of the 2020 census. While it surrounds the city of Trenton, the city is no longer part of the township. It is named for James Madison, president of the United States at the time of its creation in 1810, and is one of twenty Madison Townships statewide.

Butler County is a county located in the southwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 390,357. Its county seat and largest city is Hamilton. It is named for General Richard Butler, who died in 1791 during St. Clair's Defeat. Located along the Great Miami River, it is also home to Miami University, a public university founded in 1809. Butler County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area. The majority of the county is in District 52 of the State House.