Al-Husayn ibn al-Qasim (Arabic: الحسين بن القاسم) was a senior official of the Abbasid Caliphate who served as vizier from September 931 until May 932.

Hailing from the Banu Wahb, a family of Nestorian Christian origin that had served in the caliphal bureaucracy since late Umayyad times, al-Husayn was the son, grandson and great-grandson of viziers.

[4] The latter tried to secure his dismissal from the caliph, and almost succeeded; it was only his demand that al-Husayn be exiled to Oman that made al-Muqtadir oppose it.

At the same time, al-Husayn felt so threatened by the powerful general that he slept in a different house each night to prevent his arrest.

He tried to restore the state finances, but fell from power due to the incessant court rivalries in May 932.