The California Institute of Technology is a private doctorate-granting university located in Pasadena, California, United States. Although founded as a preparatory and vocational school by Amos G. Throop in 1891, the college attracted influential scientists such as George Ellery Hale, Arthur Amos Noyes, and Robert Andrews Millikan in the early 20th century.

In 1934, Caltech was elected to the Association of American Universities, and the antecedents of NASA's Jet Propulsion Laboratory, which Caltech continues to manage and operate, were established between 1936 and 1943 under Theodore von Kármán. The university is one among a small group of Institutes of Technology in the United States which tends to be primarily devoted to the instruction of technical arts and applied sciences.

Caltech is frequently cited as one of the world's best universities. Despite its small size, 33 Caltech alumni and faculty have won a total of 34 Nobel Prizes (Linus Pauling being the only individual in history to win two unshared prizes) and 71 have won the United States National Medal of Science or Technology. There are 112 faculty members who have been elected to the United States National Academies. In addition, numerous faculty members are associated with the Howard Hughes Medical Institute as well as NASA.

The California Institute of Technology (Caltech) is a world-renowned science and engineering research and education institution, where extraordinary faculty and students seek answers to complex questions, discover new knowledge, lead innovation, and transform our future.

The mission of the California Institute of Technology is to expand human knowledge and benefit society through research integrated with education. We investigate the most challenging, fundamental problems in science and technology in a singularly collegial, interdisciplinary atmosphere, while educating outstanding students to become creative members of society.

Founded as Throop University in 1891 in Pasadena, California, and renamed the California Institute of Technology in 1920.