Althiburos (Punic: 𐤏𐤋𐤕𐤁𐤓𐤔, ʿltbrš[1] or 𐤀𐤋𐤕𐤁𐤓𐤔, ʼltbrš[2]) was an ancient Berber, Carthaginian, and Roman settlement in what is now the Dahmani Delegation of the Kef Governorate of Tunisia.

The ruins of Althiburos are located near Fej El Tamar on the Ouartane Plateau about 9 km (5.6 mi) southwest of the town of Medeina.

It retained a local Punic-style dual magistracy under sufetes well into the early empire, although at one point the city conceived a regional innovation and installed three executives at once.

[7] In the 2nd century, under the emperor Hadrian, it was granted municipal status and Italian rights under the name Municipium Aelium Hadrianum Augustum Althiburitanum.

Excavations begun in 1908, interrupted and resumed in 1912, reveal part of the forum, a main street and a monumental door to a bay, with an inscription dedicated to Hadrian.