- Ibn al-Khayyāṭ, Abū Bakr ibn Muḥammad, -14082
- Ibn al-Najjār, Taqī al-Dīn Muḥammad ibn Aḥmad, 1492 or 1493-1564 or 1565. Mukhtaṣar al-Taḥrīr2
- Ibn al-ʻArabī, 1165-1240. Manẓūmat Kashf al-Rān2
- Ibn Ḥajar al-Haythamī, Aḥmad ibn Muḥammad, approximately 1503-approximately 1566. Fatḥ al-mubīn li-sharḥ al-Arbaʻīn2
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Nuzhat al-naẓar fī tawḍīḥ Nukhbat al-fikar2
- Ijtihād (Islamic law)2
- Illumination of books and manuscripts, Iranian2
- Illumination of books and manuscripts, Turkish2
- Indexes2
- India--Mughal Empire2
- Indian philosophy2
- Insertions (Provenance)2
- Intercessory prayer--Judaism2
- Interest (Islamic law)2
- Irshād al-adhhān ilá aḥkām al-īmān (Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf)2
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ2
- Ishārāt wa-al-tanbīhāt (Avicenna)2
- Islam--Miscellanea--Early works to 18002
- Islamic astrology2
- Islamic astronomy2