Is Caltech or Princeton harder to get into?

Caltech is typically harder to get into in a simple head-to-head sense, mostly because it enrolls a much smaller undergraduate class and looks for a very specific kind of applicant. Princeton is also among the most selective schools in the country, but its larger class size and broader academic range mean there are more kinds of strong applicants who can fit. For a high school student applying to both, Caltech is usually the tougher admit.

One concrete difference is scale. Caltech has a tiny undergraduate population, so there are fewer seats available each year. Princeton is still extremely selective, but it brings in a significantly larger first-year class, which makes the raw numbers a little less restrictive.

Another difference is the kind of student each school is looking for. Caltech is intensely STEM-focused and tends to favor applicants with unusually strong preparation in math, physics, research, or high-level problem solving. Princeton also values academic excellence at the highest level, but because it offers strength across the humanities, social sciences, natural sciences, and engineering, there is a wider range of academic profiles that can make sense there.

The admissions read can also feel narrower at Caltech. A student might be exceptional overall and still not look like a close match for Caltech’s especially technical, theory-heavy environment. At Princeton, the bar is just as elite, but the institution has more room for different intellectual styles, extracurricular strengths, and academic interests.