Big Walnut Local School District was formed by a legislative action of the Delaware County Board of Education in January 1950.

The first one story building in the Big Walnut Local School District was very modern with the best gym in the county.

One addition was added in 2006, but ultimately the tenants outgrew the facility, moving into the current building in January 2022.

The official school colors are scarlet and Goldenrod, however, Red and Gold are typically used and accepted.

As of the 2022-2023 school year, the following Ohio High School Athletic Association (OHSAA) sanctioned sports were offered; Baseball Basketball (Boys/Girls) Bowling (Boys/Girls) Cross Country (Boys/Girls) Football (Boys) Golf (Boys/Girls) Gymnastics (Girls) Lacrosse (Boys/Girls) Soccer (Boys/Girls) Softball Swimming & Diving (Boys/Girls) Tennis (Boys/Girls) Volleyball (Boys/Girls) Wrestling (Boys/Girls)[3] Cheerleading - 2013, 2021, 2023 Varsity Football - 2007 Boys' Golf - 2002