United States International University Africa, also known as USIU Africa, is a private university in Kenya, the largest economy in the East African Community. The university is accredited by the Commission for Higher Education (CUE) in Kenya and by the Western Association of Schools and Colleges (WASC).The university campus is located in the Roysambu neighborhood, in the Kasarani suburb of Nairobi, Kenya's capital and largest city.

The university was established in 1969 as the Nairobi Campus of United States International University (USIU), a San Diego -based institution. In 1999, the United States International University, Nairobi Campus, established itself as a separate university under its new name: USIU Africa. In 2001, USIU merged with the California School of Professional Psychology (CSPP) to form Alliant International University.

Over 130 nationalities are represented among the student population undertaking 24 undergraduate, graduate and doctoral programs at USIU Africa. The university has an alumni population in excess of 140,000.