The California Institute of Technology currently reports the lowest college acceptance rate in the United States at roughly 3%, followed closely by Columbia University, Harvard University, Stanford University, the University of Chicago, and Yale University, each at about 4%. These figures reflect the fall 2024 entering class, the most recent full cycle reported across federal and institutional sources.
Students and families often ask what college has the lowest acceptance rate and which schools are the toughest to get into. This guide lists the most selective institutions with their reported percentages, explains what those numbers actually measure, and shows how to use them to build a balanced college list.