Tisili is a former city and diocese of in Roman Africa; it is now a Catholic titular see in modern Tunisia, with its precise location not being defined.
Tisili was important enough in the Roman province of Africa proconsularis to become a suffragan bishopric of its capital Carthage's Metropolitan Archbishopric.
It was however to fade with the city.
The diocese was nominally restored as a titular bishopric in 1933.
It has had the following incumbents, all of the lowest (episcopal) class :