- Kanz al-wuṣūl ilá maʻrifat al-uṣūl (Bazdawī, ʻAlī ibn Muḥammad)2
- Karaites2
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)2
- Khaṣṣāf, Aḥmad ibn ʻUmar, d. 874 or 5. Adab al-qāḍī2
- Khūjahʹzādah, ʻAbd al-Naṣīr ibn ʻAbd Allāh, active 16th century. Taḥrīrāt ʻalá al-Ṭarīqah al-Muḥammadīyah2
- Kings and rulers--Religious aspects2
- Kirmāstī, Yūsuf ibn ḥusayn, d. 1500. Wajīz fī al-uṣūl2
- Kufic2
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)2
- Learning and scholarship2
- Leaves2
- Lebanon2
- Legal documents2
- Legal forms2
- Letter writing, Persian2
- Loans (Islamic law)2
- Logic, Medieval2
- Love poetry, Arabic2
- Mamelukes2
- Manners and customs2