Twenty-seven constituent and affiliated libraries combine to make the library system of the University of California, Berkeley the sixth largest research library by number of volumes in the United States.

The University of California, Berkeley is a public land-grant research university in Berkeley, California. Founded in 1868 and named after Anglo-Irish philosopher George Berkeley, it is the state's first land-grant university and the founding campus of the University of California system. Berkeley is also a founding member of the Association of American Universities. It has been regarded as one of the top universities in the world.