Founded in 1926, the Rumson Country Day School is a coeducational, nonsectarian independent day school located on a 14,000-square-foot (1,300 m2) campus in Rumson, New Jersey, specializing in educating boys and girls from nursery (age three) through eighth grade.

In Grades 6-8 (Upper School), classes are departmentalized and honors sections are offered in English, math and foreign language (French and Spanish).

The school offers a traditional curriculum of English grammar and literature, mathematics, science, social studies, foreign language (French, Spanish, and Latin), art, crafts, wood shop, music and physical education.

In September 2010, the school officially opened the new William I. Riker Academic Center, an addition covering 22,000 square feet (2,000 m2) that includes a new main library, new computer lab and art rooms, a seminar room and three new age-specific science labs.

Winter sports include: basketball (boys and girls), and ice hockey: started in 2007 with one game which was won 4-0 against Princeton Day School.