Chi Phi is an American collegiate social fraternity. It formed in 1874 through the merger of earlier organizations that also used the name Chi Phi; the earliest of these was established at Princeton University in 1824.

The fraternity has about 51 active chapters, according to the supplied research. Its Cornell chapter was named in a 2026 civil lawsuit filed by a former student identified as Jane Doe. She alleges that seven fraternity members drugged and gang-raped her at the chapter house in 2024. The allegations have not been established as facts, and the seven men deny wrongdoing.

The research extract says Cornell’s disciplinary process resulted in the closure of the Chi Phi chapter and its permanent exclusion from campus.