Johnstown-Monroe High School is a public high school in Johnstown, Ohio. It is the only high school in the Johnstown-Monroe Local School District. It was erected in 2018 and currently houses grades 9-12. The current principal is Mr. Michael Shipton. The district superintendent is Dr. Philip H. Wagner.

Enrollment fluctuates around 540 students. In recent years, the enrollment has risen in completion of the new school buildings which opened during the second semester of the 2017-18 school year.

Johnstown Monroe High School has many athletic teams in which students can participate. These include soccer, band, cheerleading, football, softball, baseball, track and field, basketball, lacrosse, golf, wrestling, and cross country.

In years past, Johnstown has had very successful sports teams with many making it to the regional playoffs. The Johnnies have a rivalry with the Northridge Vikings.

Johnstown Monroe High School's Senior Class has a 5-member body of Class Officers, consisting of Class President, Class Vice President, Class Representative, Class Treasurer, and Class Secretary. In 2023, outgoing president, Alex Colley, endorsed Dametrius Brown for class president in Brown's successful bid for the office. President Brown promised that the “Power to the Class Initiative" enacted during President Colley's term would continue under his watch. The Power to the Class Initiative is a promise of transparent decision making from students who hold class officer positions and acts as a living archive of information and history regarding Johnstown-Monroe High School's former class officers.

The text of the initiative reads:

"The enactment of this policy mandates that the elected representatives of Johnstown-Monroe High School's senior class shall diligently keep their respective classmates informed about notable events throughout the school year. In alignment with prior commitments to enhance student involvement in their educational experience, the duly elected class officers are expected to actively listen to and consider ideas and feedback from their peers. The primary objective of this policy is to foster a transparent relationship between the class government and the student body, thereby eliminating any barriers to open communication and idea exchange."

The current class president is Brandon Weisenberger, who was elected in May of 2024. President Weisenberger's term is set to expire in May of 2025.

In February 2024, Intel and Meta collaborated to inaugurate an Innovation and Engineering Lab for Johnstown-Monroe High School students. Collectively, the two labs house approximately $500,000 worth of technology, aimed at fostering new opportunities for students interested in STEM fields and other career paths. These labs are a result of Intel's commitment to supporting positive educational initiatives, following the company's 2022 announcement of the construction of its latest semiconductor fabrication plant. Ohio's Lt. Governor, Jon Husted, joined Meta leaders, school officials, and students at a ribbon cutting ceremony on February 26th, 2024 as a result of the creation of the two labs.

• Official website