The diocese of Presidio (Latin: Dioecesis Praesidiensis) is a suppressed and titular see of the Catholic Church.
Presidium, identifiable with ruins at Henchir-Somâa in present-day Tunisia, is an ancient episcopal seat of the Roman province of Byzacena.
There are two bishops known from this diocese.
Today, Presidio survives as a titular see; the current titular bishop is Roger William Gries, former auxiliary bishop of Cleveland.