- Jāmī, 1414-1492. Muʻammayāt asmāʾ al-ḥusná1
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Risālat al-Tawḥīd1
- Karmī, Marʻī ibn Yūsuf, -1623 or 16241
- Kashmir Śaivism1
- Khalwatīyah1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khiḍr (Legendary character)1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Khuzāʻī, Diʻbil ibn ʻAlī, 765 or 766-860 or 861. Qaṣīdah1
- Kings and rulers--Duties1
- Kings and rulers--Religious aspects--Hinduism1
- Kisāʼī, ʻAlī ibn Ḥamzah, -804 or 8051
- Knowledge, Theory of (Hinduism)1
- Knowledge, Theory of (Islam)1
- Kumayl ibn Ziyād, 633 or 634-7011
- Kāfī (Kulaynī, Muḥammad ibn Yaʻqūb)1
- Kārtavīryārjuna (Hindu deity)1
- Kārttikeya (Hindu deity)1
- Laments1