California Polytechnic State University, San Luis Obispo is a public university in San Luis Obispo County, California, United States, outside of the city limits of San Luis Obispo. Founded in 1901, it is the oldest of three polytechnic universities within the California State University system. Cal Poly emphasizes a "learn by doing" philosophy, integrating hands-on, practical experiences into its curriculum. As of fall 2025, Cal Poly had approximately 22,000 undergraduate and 900 graduate students.