The Diocese of Fez was a short-lived (c. 1225 – 1237) was a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in Fez, Morocco.
The Diocese of Fez (Fes, Fecen(sis) or Fessen(sis)) was a Latin Church diocese established around 1225 in the territory of modern Morocco, without direct predecessor.
Its only resident incumbent Ordinary was :
Suppressed circa 1237, its territory being merged into the Diocese of Marocco (at Marrakech, also in present Morocco), to which its incumbent bishop Agnello was appointed.
Circa 1496 the diocese was nominally restored as a Latin titular see, though it was however again suppressed even as titular see in 1730, having had the following incumbents, all of the fitting episcopal rank: