Sinnada should not be confused with Synnada.
Sinnada was an ancient city in Mauretania Caesariensis.
Its location is presumed near Kenada, in modern Algeria.
Sinnada was a suffragan bishopric of the metropolitan see of Caesarea Mauretaniae, but later faded.
The diocese was nominally restored in 1933 as a Latin Catholic titular bishopric.
It has had three incumbents of the lowest (episcopal) rank and one of the intermediary (archiepiscopal) rank.