Despite the Tridentine Mass being supplanted by a new form of the Roman Rite Mass, some communities continued celebrating pre-conciliar rites or adopted them later. This includes priestly societies and religious institutes which use some pre-1970 edition of the Roman Missal or of a similar missal in communion with the Holy See. The following list includes those communities who are in full communion with the Catholic Church, as well as groups that are not in full communion with the Holy See, with these being demarcated in two main sections. Most use a pre-1970 edition of the Roman Missal, usually 1962 Missal, but some follow other Latin liturgical rites and thus celebrate not the Tridentine Mass but a form of liturgy permitted under the 1570 papal bull Quo primum. The use of a pre-1970 Roman Missal has never been prohibited by the Catholic Church. Despite never being suppressed by the Church, it was rarely used post-Vatican II. To clarify the fact that the Extraordinary Form of the Roman Rite has never been abrogated and expand the liturgy's use, Pope Benedict XVI issued in 2007 a motu proprio titled Summorum Pontificum. In 2021, Pope Francis abrogated these more expansive permissions with his motu proprio Traditionis custodes, seeking to emphasize the celebration of the more commonly used Ordinary Form of the Mass. Many of these communities describe themselves as traditionalist Catholics. As of 2023, the largest priestly communities using the Tridentine Mass exclusively are Society of Saint Pius X (SSPX) with 707 priests, Priestly Fraternity of Saint Peter (FSSP) with 386 priests, Institute of Christ the King Sovereign Priest (ICKSP) with 147 priests and Institute of the Good Shepherd (IBP) with 61 priests.

Communities in full communion with the Holy See

Priestly institutes

Exclusively traditional Mass International

Male religious

Exclusively traditional Mass International Australia Czech Republic France Germany Ireland Italy Spain United States Not exclusively traditional Mass International Australia Canada England France Ireland Italy United States Wales Do not offer Mass themselves

Female religious

Exclusively traditional Mass International Australia Colombia England France Italy Liechtenstein Mexico New Zealand Spain Sweden Switzerland United States Not exclusively traditional Mass International England France Italy United States

Others

Communities not in full communion with the Holy See

Sedevacantist groups

Sedeprivationist groups

Independent groups