The Warren Hills Regional School District is comprehensive public school district located in Warren County, New Jersey that serves seventh grade through twelfth grades, including students from the municipalities of Franklin Township, Mansfield Township, Washington Borough and Washington Township, while students from Oxford Township attend the district's high school for grades 9-12 as part of a sending/receiving relationship.As of the 2014-15 school year, the district and its two schools had an enrollment of 1,906 students and 144.5 classroom teachers (on an FTE basis), for a student–teacher ratio of 13.2:1.The district is classified by the New Jersey Department of Education as being in District Factor Group "FG", the fourth-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.