The Storm King School (SKS) is an independent coeducational boarding and day school in Cornwall-on-Hudson, New York, United States. Established in 1867, it is one of New York's oldest boarding schools. It is a college preparatory school for students in grades 8 to post-graduate, with an enrollment of 185 and 37 faculty living on or near campus through the year.

The Storm King School ranks as the 36th best boarding school in North America. Its recent graduates matriculated into some of the top universities in the United States, including Harvard University, The University of Chicago, Carnegie Mellon University, Yale University, Georgetown University, Columbia University, Cornell University, MIT, University of Notre Dame, University of Pennsylvania, NYU Stern School of Business, Tufts University, Wellesley College, University of Virginia and the US Military Academy at West Point.

The Storm King School's students have been nominated to serve as pages at the United States Senate, won prestigious scholarships with the United States Senate Youth Program, appeared in the top 20 of the American Idol competition, and received athletic scholarships to NCAA programs throughout the nation.

The school enrolls students from 25 countries. Seventy-five percent of students are boarding, and 25% are day students. Fifty-three percent are male and 47% female.

The school is accredited by the New York Association of Independent Schools, and is a member of the New York State Association of Independent Schools, the National Association of Independent Schools, the College Board, and other education organizations.

A 15-member board of trustees governs the school.