- Iran--Kāshān2
- Iran--Qum2
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ2
- Ishrāqīyah2
- Islam and philosophy2
- Islam--Apologetic works2
- Islam--Prayers and devotions2
- Islamic New Year2
- Islamic interpretations of Adam2
- Islamic literature2
- Islamic occultism2
- Islamic poetry, Persian2
- Islamic sects2
- Islamic sermons, Persian2
- Isnawī, ʻAbd al-Raḥīm ibn al-Ḥasan, 1305-1370. Sharḥ al-Minhāj2
- Jaʻbarī, Arslān ibn Yaʻqūb, -1300. Risālat al-tawḥīd2
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah2
- Ji bu--Bie ji lei--Ming2
- Judaism2
- Khalwatīyah2