Columbia University Libraries is the library system of Columbia University and one of the largest academic library systems in North America. With 15.0 million volumes and over 160,000 journals and serials, as well as extensive electronic resources, manuscripts, rare books, microforms, maps, and graphic and audio-visual materials, it is the fifth-largest academic library in the United States and the largest academic library in the State of New York. Additionally, the closely affiliated Jewish Theological Seminary Library holds over 400,000 volumes, which combined makes the Columbia University Libraries the third-largest academic library, and the second-largest private library in the United States.

Columbia University, officially Columbia University in the City of New York, is a private, Ivy League, research university in New York City, United States. Established in 1754 as King's College on the grounds of Trinity Church in Manhattan, it is the oldest institution of higher education in New York and the fifth-oldest in the United States and is considered one of the most prestigious universities in the world.