Hillsdale Public Schools are scheduled to reopen Tuesday, though they will have early dismissal.
All three schools in the borough's K-8 district had been closed since Hurricane Sandy caused damage and extensive power outages.
The district will hold full days Wednesday, Thursday and Friday.
Westwood Regional Schools, Pascack Valley High School and St. John's Academy had also been closed, but opened Monday.
Immaculate Heart Academy in Washingon Township was also scheduled to reopen Tuesday.