Ausana was an ancient Roman-Berber city and bishopric in Tunisia. It is now a Latin Catholic titular see.

Ausana was important enough in the Late Roman province of Africa Proconsularis to become one of the suffragans of its capital Carthage's Metropolitan Archbishopric, but like most was the fade.

The diocese was nominally restored in 1989 as Latin Catholic titular bishopric.

So far its only incumbent, of the fitting episcopal (lowest) rank, is:

• Former Bishop (1990.05.26 – 2020.10.26) Józef Zawitkowski, Auxiliary Bishop of Łowicz (Poland).
• Titular Bishop (2020.12.19 - ....) Raúl Pizarro, Auxiliary Bishop of Roman Catholic Diocese of San Isidro (Argentina).

• Catholic Church in Tunisia

• GCatholic