Abū Jaʿfar Hārūn ibn Muḥammad al-Wathiq bi'Llah (Arabic: أبو جعفر هارون بن محمد, romanized: Abū Jaʿfar Hārūn ibn Muḥammad;, commonly known by his regnal name al-Wathiq bi'Llah, was an Abbasid caliph who reigned from 842 until his death in 847.
- Occupation
- politician, caliph
- Position held
- Abbasid caliph
- Citizenship
- Abbasid Caliphate
- Born
- July 17, 812, 815
- Died
- August 10, 847, 847
