Edgerton is a village in Williams County, Ohio, United States in the extreme northwest corner of the state. The population was 1,881 at the 2020 census. The area around Edgerton was organized as St. Joseph Township on December 2, 1832. Edgerton was platted in 1854. The village was named after Alfred Peck Edgerton, a land agent and U.S. congreā¦Edgerton is a village in Williams County, Ohio, United States in the extreme northwest corner of the state. The population was 1,881 at the 2020 census. The area around Edgerton was organized as St. Joseph Township on December 2, 1832. Edgerton was platted in 1854. The village was named after Alfred Peck Edgerton, a land agent and U.S. congressman. A post office was established in 1854. The village was incorporated on December 4, 1865.