The Priestly Fraternity of St. Peter is a Clerical Society of Apostolic Life of Pontifical right, that is, a community of Roman Catholic priests who do not take religious vows, but who work together for a common mission in the world. The mission of the Fraternity is two-fold: first, the formation and sanctification of priests in the cadre of the traditional liturgy of the Roman rite, and secondly, the pastoral deployment of the priests in the service of the Church.

The Fraternity was founded on July 18, 1988 at the Abbey of Hauterive (Switzerland) by a dozen priests and a score of seminarians.

Members: Total: 347
Priests (including associated & postulating priests): 208
Deacons: 11
Seminarians: 128
Members' average age: 37 years
Deceased members: 4
Nationalities: 26