The Holderness School is a private, coeducational college-preparatory school in Holderness, near Plymouth, New Hampshire in the United States. The student body of 275 is drawn from 22 U.S. states and 14 foreign countries. While Holderness operates primarily as a boarding school, it also enrolls 50 day students. The Head of School (headmaster) is R. Phillip Peck, M.Ed. In the summer the campus is used as a site for various Gordon Research Conferences.
 
Founded in 1879 under the auspices of the Episcopal Diocese of New Hampshire, the school retains some links with the denomination, but now conducts ecumenical chapel services and welcomes applicants of all faiths.
In 2010 its Boys Varsity Soccer Team won the Class C NEPSAC title.
 
The freshman class participates in Project Outreach, a community service project. Artward Bound offers sophomores a 10-day program of intensive study with professional artists in disciplines such as glass-blowing, blacksmithing, African dance, and stand-up comedy. The "Outback" program is a cornerstone of life at Holderness. In Outback, juniors trek several days in a winter expedition, keep a personal journal, and experience three days solo under protective gear. In a "Senior Project," students go off-campus for work and study approved by advisors. Winter Carnival intramural competitions create team works of winter art and performanc
 
Another key aspect of Holderness School is its unique "Job Program." Every student is required to perform a campus job, whether it is washing dishes at breakfast, leading a dormitory, or raking leaves. Students are not paid for these activities, but do their jobs as community members. The Job Program brings community closer and develops well-rounded students.