Creighton University () is a private research university in Omaha, Nebraska, United States. Founded by the Society of Jesus in 1878, the university is accredited by the Higher Learning Commission. In 2015 the university enrolled 8,393 graduate and undergraduate students on a 140-acre (57 ha) campus just outside of downtown Omaha. It is classified among "R2: Doctoral Universities – High research activity". The university operates the Creighton University Medical Center. It has a second campus focused on health sciences located in Phoenix, Arizona.