The University of Saint Katherine (USK) is a private, non-profit undergraduate and graduate university located in San Marcos, California. Founded by Frank J. Papatheofanis, MD, PhD, It opened in 2011, and has grown each year in enrollment from its inaugural class of 11 in 2011 to 275 in 2021. The university's mission is to provide a balanced education in the liberal arts and sciences, founded and rooted in the life of the Eastern Orthodox tradition – Inquiry Seeking Wisdom.