- Ibn Wahbān, ʻAbd al-Wahhāb ibn Aḥmad, -1366 or 1367. Qaʼid al-sharāʼid wa-naẓm al-fawāʼid1
- Ibn al-Bārizī, Hibat Allāh ibn Najm al-Dīn, 1247-13381
- Ibn al-Khayyāṭ, Abū Bakr ibn Muḥammad, -14081
- Ibn ʻAbd al-Razzāq, ʻAbd al-Raḥmān ibn Ibrāhīm, -1727. Qalāʻid al-manẓūm1
- Ibn ʻĀbidīn, Muḥammad Amīn ibn ʻUmar, 1783 or 1784-1836. ʻUqūd rasm al-muftī1
- Ibn Ḥajar al-Haythamī, Aḥmad ibn Muḥammad, approximately 1503-approximately 1566. Iʻlām bi-qawāṭiʻ al-Islām1
- Ibn Ḥajar al-Haythamī, Aḥmad ibn Muḥammad, approximately 1503-approximately 1566. Mawlid1
- Imaginary letters1
- Imamate1
- Immortality--Islam1
- Imām al-Ḥaramayn al-Juwaynī, ʻAbd al-Malik ibn ʻAbd Allāh, 1028-1085. Burhān fī uṣūl al-fiqh1
- Indexes1
- India--Delhi1
- Intellect--Religious aspects--Islam1
- Iran--Ardabīl1
- Iran--Hamadān1
- Iran--Qum1
- Iran--Tabrīz1
- Iraq--Karbalāʼ1
- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1