Delphos Jefferson High School is a public high school located in Allen County, Ohio for reporting purposes only. Jefferson High School is physically located in Van Wert County, Ohio. It also serves parts of Van Wert County, Ohio. Delphos City Schools has only one building (Franklin Elementary) located in Allen County, Ohio, and two (Jefferson Middle School and Jefferson High School) located in Van Wert County, Ohio. Another building is used for grades 1-5, Landeck Elementary school located in Landeck Ohio. Landeck is located a few miles outside of Delphos.