- Islam and politics1
- Islam--Theology1
- Islamic calendar1
- Islamic chronology1
- Islamic ethics1
- Islamic interpretations of Adam1
- Islamic learning and scholarship1
- Islamic poetry, Turkish1
- Istiṣḥāb (Islamic law)1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʾid fī sharḥ Tajrīd al-qawāʻid1
- Jabbārīyah1
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Judaism1
- Jābir ibn Ḥayyān1
- Jāmiʻ al-ṣaḥīḥ (Bukhārī, Muḥammad ibn Ismāʻīl)1
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)1
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khiḍr (Legendary character)1
- Knowledge, Theory of (Islam)1