- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb2
- Ibn al-Nāẓim, Muḥammad ibn Muḥammad, d. 1287 or 8. Sharḥ al-Alfīyah2
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Tahdhīb al-Tahdhīb.--Abridgment2
- Illinois--Chicago2
- Imamate2
- India--Hyderabad2
- Insertions (Provenance)2
- Iran--Tabrīz2
- Iran--Tehran2
- Iraq--Karbalāʼ2
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 1285. Lubāb al-iʻrāb2
- Ishārāt wa-al-tanbīhāt (Avicenna)2
- Islam and philosophy2
- Islam--Terminology2
- Islamic heresies2
- Islamic illumination of books and manuscripts2
- Islamic occultism2
- Israel--Acre2
- Iḥyāʼ ʻulūm al-dīn (Ghazzālī)2
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah2