St Catharine's College is a constituent college of the University of Cambridge. Founded in 1473 as Katharine Hall, it adopted its current name in 1860. The college is nicknamed "Catz". The college is located in the historic city-centre of Cambridge, and lies just south of King's College and across the street from Corpus Christi College. The college is notable for its open court (rather than closed quadrangle) that faces towards Trumpington Street.

St Catharine's is unique in being the only Oxbridge college founded by the serving head of another college. The college community is moderately sized, consisting of approximately 70 fellows, 150 graduate students, and 410 undergraduates.