- Ibn Amīn al-Dawlah, al-ʻAfīf, active 15th century. Lamḥah al-ʻAfīfīyah fī al-ṭibb1
- Ibn Saʻādah, Aḥmad ibn ʻAlī, active 13th century. Risālat al-ʻilm1
- Ibn al-Fāriḍ, ʻUmar ibn ʻAlī, 1181 or 1182-1235. Tāʾīyah1
- Ibn al-ʻArabī, 1165-12401
- Ijtihād (Islamic law)1
- Illegible markings1
- Illinois--Chicago1
- Illumination of books and manuscripts, Mosan1
- Illumination of books and manuscripts, Renaissance1
- Imamate1
- Imams (Shiites)1
- Imams (Shiites)--Biography1
- Imāmʹzādah, Muḥammad ibn Abī Bakr, 1097 or 1098-1177 or 1178. Shirʻat al-Islām1
- India--Delhi1
- India--Hyderabad1
- Indulgences1
- Inheritance and succession (Islamic law)1
- Inquisition1
- Insular scripts1
- Intabulations1