Ain Zana (Aïn-Zana) is a town and commune in Souk Ahras Province in north-eastern Algeria.

It is the site of Diana Veteranorum, a former ancient city and bishopric in Numidia.

[1] Diana was important enough in the Roman province of Numidia to become one of the many suffragan bishoprics no later than mid third century AD, yet was to fade.

The diocese was nominally restored in 1933 as a Latin titular bishopric.

This article about a location in Souk Ahras Province is a stub.