Geisel Library is the main library building of the University of California, San Diego. It is named in honor of Audrey and Theodor Seuss Geisel, better known as children's author Dr. Seuss. The building's distinctive architecture, described as occupying "a fascinating nexus between brutalism and futurism", has resulted in its being featured in the UC San Diego logo and becoming the most recognizable building on campus.

The University of California, San Diego is a public land-grant research university in San Diego, California, United States. Established in 1960 near the pre-existing Scripps Institution of Oceanography, UC San Diego is the southernmost of the ten campuses of the University of California, and offers over 200 undergraduate and graduate degree programs, enrolling 33,096 undergraduate and 9,872 graduate students. The university occupies 2,178 acres (881 ha) near the coast of the Pacific Ocean, with the main campus resting on approximately 1,152 acres (466 ha).