Northern Highlands Regional High School (NHRHS) is a regional public high school and school district in Allendale, in Bergen County, in the U.S. state of New Jersey. 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. The high school is the only facility of the Northern Highlands regional High School District.