- Islamic heresies1
- Islamic interpretations of Jesus Christ1
- Islamic poetry, Arabic1
- Islamic sermons1
- Ismāʻīl ibn ʻAbd Allāh, 1792 or 1793-18631
- Isnawī, ʻAbd al-Raḥīm ibn al-Ḥasan, 1305-13701
- Israel--Tsefat1
- Istiṣḥāb (Islamic law)1
- Jammāʻīlī, ʻAbd al-Ghanī ibn ʻAbd al-Wāḥid, 1146-12031
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Jinn1
- Judges (Islamic law)1
- Jurisprudence1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Mukhtaṣar al-Muntahá1
- Jāmiʻ al-Qarawīyīn (Fès, Morocco)1
- Jāmī, 1414-1492. Risālah-i muʻammā1
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Kalbī, Diḥyah ibn Khalīfah, -approximately 6701
- Kardarī, Ibn al-Bazzāz, -1424. Fatāwá al-Bazzāzīyah1
- Kashshāf (Zamakhsharī, Maḥmūd ibn ʻUmar)1