The Birch Wathen Lenox School is a college preparatory K-12 school on the Upper East Side of Manhattan in New York City.

Birch Wathen Lenox comprises approximately 500 students from all around New York City.

Birch Wathen Lenox was created in 1991 through the merger of the Birch Wathen School (founded in 1921 by Louise Birch and Edith Wathen), and The Lenox School (founded in 1916 by Jessica Garretson Finch).

Between 1962 and 1989, Birch Wathen was located in the Herbert N. Straus House, an ornate French-style building at 9 East 71st Street across from the Frick Collection Birch Wathen Lenox fields teams in soccer, volleyball, swimming, basketball, baseball, cross country, track and field, golf, tennis, hockey and roblotics.

Athletic teams play under the auspices of the Independent Schools Athletic League (New York) or the Girls Independent School Athletic League, which are leagues in the NYSAISAA (New York State Association of Independent Schools Athletic Association).