- Ibn al-ʻImād al-Aqfahsī, Aḥmad, approximately 1349-1405. Ādāb mā yatakarraru fī al-yawm wa-al-laylah1
- Ibn ʻAbd al-Barr, Yūsuf ibn ʻAbd Allāh, 978 or 979-1071. Jāmiʻ bayān al-ʻilm wa-faḍlih1
- Ibn ʻAqīl, ʻAbd Allāh ibn ʻAbd al-Raḥmān, 1294?-1367. Sharḥ al-Alfīyah1
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Tahdhīb al-Tahdhīb.--Abridgment1
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyat1
- Inquisition1
- Interest (Islamic law)1
- Interfaith relations1
- Iran1
- Iran--Dizfūl1
- Iran--Sabzevār (Khurāsān-i Raz̤avī)1
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ1
- Ishārāt wa-al-tanbīhāt (Avicenna)1
- Islam and philosophy1
- Islam--Functionaries1
- Islam--Prayers and devotions1
- Islamic New Year1
- Islamic calendar1
- Islamic cosmology1
- Islamic eschatology1