Abu al-Abbas Ahmad II (Arabic: أبو العباس أحمدر) (reigned 1370–1394) was a Hafsid Caliph of Ifriqiya.
He restored the Hafsid kingdom to full power after a period of disarray which followed the invasion of Ifriqiya led by Abu Inan Faris of the Marinids.
By 1350, Constantine was virtually independent of the Caliph in Tunis, and from 1351 to 1356, Ahmad fought with the Tunisian branch of the Hafsid dynasty.
Due to the rivalry between the Marinids and the Abdelwadids and the struggle between them, the western border of the Hafsids' possessions remained calm.
In 1383, the Aragonese captured Djerba, and on July 20, 1390, the pirate stronghold of Mahdia was attacked by the Genoese with the support of the French and English knights led by Louis II of Bourbon.