Governorate Population (2014) Population Density Largest town/city Tunis[2] 1.056.247 3,100/km2 Tunis ( 638,845 ) Nabeul 787,920 280/km2 Hammamet ( 97,579 ) Ben Arous 631,842 800/km2 Mohamedia-Fouchana ( 106,167 ) Ariana 576,088 1,200/km2 Ettadhamen-Mnihla ( 196,298 ) Bizerte 568,219 150/km2 Bizerte ( 142,966 ) Menouba 379,518 330/km2 Douar Hicher ( 82,532 ) Zaghouan 176,945 64/km2 El Fahs ( 23,556 )