St. John's High School is a Roman Catholic private high school located in Delphos, Ohio, United States. It is located in Allen County. It is part of the Roman Catholic Diocese of Toledo. The mascot of the school is the Blue Jay. The school is associated with the Midwest Athletic Conference for sports. St. John's is very well known for being successful in its sports and its high academic standards.Ohio High School Athletic Association State Championships Football - 1997, 1998, 1999, 2005, 2008, 2010 Boys Basketball – 1949, 1983, 2002 Girls Basketball – 1977, 1979, 1980, 1987, 2002 Boys Golf - Andy Miller 1998