Mammilla was an ancient city and bishopric in Algeria. It is now a Latin Catholic titular see.
The city was important enough in the Roman province of Mauretania Caesariensis to become a suffragan bishopric of its capital's Metropolitan Archbishop of Caesarea in Mauretania.
The diocese was nominally restored as a Latin Catholic titular bishopric in 1933.
It was suppressed as titular see in 1974, having had only these two incumbents, both of the lowest (episcopal) rank :