California Polytechnic State University (Cal Poly) | 133,438 followers on LinkedIn. Cal Poly is a nationally ranked, four-year, comprehensive public university, with approximately 17,500 undergraduate, 120 post-baccalaureate, and 900 graduate students. The Cal Poly community fosters teaching, scholarship, and service in a learn-by-doing environment where students, staff, and faculty are partners in discovery. Cal Poly has built an exemplary reputation on its learn-by-doing approach to the preparation of undergraduate and graduate students.