The Northern Hills Conference, was an athletic conference of nineteen private and public high schools located in Essex, Morris and Passaic County Counties in Northern New Jersey. There were nineteen member Northern Hills Conference schools, split into two divisions: Skyline and Suburban. The uneven number resulted from Passaic County Technical Institute's joining the conference; the school, long a member of the Bergen-Passaic Scholastic League, left that conference to join the Northern Hills after years of being the only Group IV school in a conference made up largely of Group I and Group II schools.