- Iraq--Karbalāʼ1
- Ireland1
- Irshād al-adhhān ilá aḥkām al-īmān (Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf)1
- Isabel, of Coimbra, Queen, consort of Afonso V, King of Portugal, 1432-14551
- Isabella I, Queen of Spain, 1451-15045
- Isagoge (Porphyry)2
- Isaiah (Biblical prophet)1
- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1
- Ise monogatari1
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. al-Lubāb fī ʻilm al-iʻrāb1
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ3
- Isidore, of Seville, Saint, -6361
- Isidore, of Seville, Saint, -636. Etymologiae1
- Islam38
- Islam and philosophy1
- Islam and politics1
- Islam--Apologetic works1
- Islam--Customs and practices16
- Islam--Doctrines48
- Islam--History--Handbooks, manuals, etc--Early works to 18002