Rumson Country Day School was founded in 1926. It was incorporated as The Rumson Country Day School in 1942. It teaches English grammar and literature, math, science, social studies, languages (French, Latin and Spanish), visual arts, music, physical education and interscholastic sports. The school teaches up to eighth-grade.

There are 450 students at the school, from Nursery School through eighth grade. It is accredited by several organizations, including the National Association of Independent Schools, the New Jersey Association of Independent Schools and the Middle States Association of Independent Schools.