Bir Mcherga ( Arabic : بئر مشارڨة ) is a town and commune in the Zaghouan Governorate, Tunisia in the northwest of Tunisia, the site of former Roman North African city and bishopric Giufi, which only remains as Latin Catholic titular see.

It is located fifty kilometers southwest of Tunis at 36° 31 'north, 9° 58 'east, in the Zaghouan Governorate.

[2] The city participates in the loosening of the industrial activities of the capital, notably because of its situation on the RN3 .

Bir Mcherga is located a few kilometers from the dam of Bir Mcherga, one of two dams on the Wadi Miliane, located 35 kilometers from its mouth in the Gulf of Tunis Benefiting from a watershed of 1,442 km 2, its reservoir lake irrigatean area of 1,600 hectares while avoiding the flood spectrum for the capital.

Giufi was among the many cities of sufficient importance to become a suffragan diocese in the Roman province of Africa Proconsularis, in the papal sway.