Peleadores MMA — Ox Fitness Lab

The first fraternity at Massachusetts Institute of Technology (MIT) was Chi Phi, established in 1873. In the fall of 2023, 43 percent of MIT's male students belonged to a fraternity, while 23 percent of female students belonged to a sorority. As of 2025, MIT has 23 social fraternities, five gender-inclusive social fraternities, ten social sororities and women's fraternities. It also has nine honor societies and recognition organizations, and one service fraternity, and two professional fraternities. Five Independent Living Groups are grouped into a separate Living Group Council, but otherwise operate similarly to residential fraternities and sororities. These are known collectively as FSILGs.