The municipality borders Carinaro, Casaluce, Cesa, Frignano, Giugliano in Campania, Gricignano di Aversa, Lusciano, San Marcellino, Sant'Antimo, Teverola and Trentola Ducenta.

[4] Only a small military fortification, a castellum, still stands in the area, which is linked to a chapel in memory of the current alleged passage through Aversa by the Apostle Paul in the year 61.

In 1030, the site was ceded to Rainulf Drengot, a cadet of the lords of Quarrel near Alençon in Normandy; he was invested as count by Duke Sergius IV of Naples and confirmed by Emperor Conrad II.

By offering a generous principle of asylum for the persecuted, Rainulf enlarged the power and importance of his little borgo, which became the base from which the Normans forged a state in Sicily and Italy.

The count of Aversa, Richard I, was one of the chief leaders in the struggle against the Papal forces which culminated in the Battle of Civitella del Fortore (1053) in Beneventan territory; even Pope Leo IX himself was captured at what turned into a rout in favour of the Normans.

The astute Richard did not treat the pope as a prisoner, however, but escorted him back to Rome with full honours, a gesture that led to the conciliation of the Normans with the Church, the lifting of the ban of excommunication that had been laid upon Aversa.

His brother, King Louis I of Hungary, head of the Capetian House of Anjou, marched into Italy and at Aversa took his vengeance at a banquet of reconciliation, as Joanna escaped to Avignon.

The presence of the court also benefitted Aversa by the institution of the Real Casa dell'Annunziata (about 1315) an orphanage and hospice that occupied a central place in Aversan public life.