Holmdel High School is a comprehensive community four-year public high school serving students in ninth through twelfth grades from Holmdel Township, in Monmouth County, in the U.S. state of New Jersey, operating as the lone secondary school in the Holmdel Township Public Schools. The school has been accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools since 1977.

Holmdel Township is a township in Monmouth County, in the U.S. state of New Jersey. Located near Raritan Bay in the Raritan Valley region, the township is a regional commercial hub of Central Jersey, home to Bell Labs and PNC Bank Arts Center, and a bedroom community of New York City in the New York Metropolitan Area.