Northern Highlands Regional High School (NHRHS) is a regional public high school and school district in Allendale, Bergen County, New Jersey, United States. The school serves students in ninth through twelfth grades from Allendale, Ho-Ho-Kus, Saddle River, and Upper Saddle River. Students from Saddle River have the option of attending either Northern Highlands or Ramsey High School, as part of sending/receiving relationships with the two districts.

As of the 2018–19 school year, the school had an enrollment of 1,377 students and 110.4 classroom teachers (on an FTE basis), for a student–teacher ratio of 12.5:1. There were 7 students (0.5% of enrollment) eligible for free lunch and 1 (0.1% of students) eligible for reduced-cost lunch.

The district was classified by the New Jersey Department of Education as being in District Factor Group "J", the highest of eight groupings. District Factor Groups organize districts statewide to allow comparison by common socioeconomic characteristics of the local districts. From lowest socioeconomic status to highest, the categories are A, B, CD, DE, FG, GH, I and J.

Northern Highlands Regional High School is accredited by the New Jersey Department of Education.