Northridge High School is located in rural northwestern Licking County, Ohio, and serves several townships in that part of the county, as well as a part of southern Knox County, Ohio.

It has a USPS address of Johnstown, Ohio, although it is about five miles northeast of that town.

The original High School is now Alexandria Elementary.

After moving from the current elementary, the High School was moved to what is now the current middle school building.

Northridge High School is a member of the Licking County League, one of the nine currently functioning members of the OHSAA Central Region athletic conferences The Vikings have a rivalry with the Johnstown Johnnies.