St Catherine's College (also known as St Catz or Catz) is one of the constituent colleges of the University of Oxford in Oxford, England and is the youngest college to teach both undergraduate and graduate students. Tracing its roots back to 1868 (although the college itself was opened in 1962), it has 505 undergraduate and 442 graduate students as of December 2018, making it the largest undergraduate college by membership in the University of Oxford (Kellogg College has 1139 students compared to St. Catherine's 992, though it is a graduate-only college). In 1974, it was also one of the first men's colleges to admit women.