- Jihad1
- Jinn1
- Judaism1
- Judges (Islamic law)1
- Jāmiʻ al-Muẓaffarī (Damascus, Syria)1
- Jāmiʻ al-ṣaghīr (Suyūṭī)1
- Karmī, Marʻī ibn Yūsuf, -1623 or 16241
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Khuzāʻī, Diʻbil ibn ʻAlī, 765 or 766-860 or 861. Qaṣīdah1
- Knowledge, Theory of (Islam)1
- Kumayl ibn Ziyād, 633 or 634-7011
- Legacies (Islamic law)1
- Legends1
- Libel and slander--Religious aspects--Islam1
- Liquor laws (Islamic law)1
- Literary style1
- Lumʻah al-Dimashqīyah (Shahīd al-Awwal, Muḥammad ibn Makkī)1
- Madrasah al-Ṭūlūnīyah (Jerusalem)1
- Mahdi1