Irvington High School is a four-year comprehensive community public high school in Irvington, in Essex County, in the U.S. state of New Jersey, that serves students in ninth through twelfth grades, as the lone secondary school of the Irvington Public Schools. IHS has three main floors and a basement, with each floor holding up to 23 classrooms. A west wing of the building was erected in the 1970s. The school is accredited by the Middle States Association of Colleges and Schools Commission on Elementary and Secondary Schools.