Biretia is an extinct genus of Old World monkey belonging to the extinct family Parapithecidae. Fossils are found from Late Eocene strata in Egypt. The first discovery of Biretia was a single tooth dated to approximately 37 mya, which was found in 1988 at the Bir el Ater site in Algeria. This species was named Biretia piveteaui. In 2005, two new species were classified, B. fayumensis and B. megalopsis. Both were discovered at Birket Qarun Locality 2 (BQ-2), which is located about 60 mi south of Cairo in Egypt's Fayum depression.