Ja'far ibn Sulayman ibn Ali al-Hashimi (Arabic: جعفر بن سليمان بن علي الهاشمي) was an early Abbasid prince.
He served as provisional governor for Abbasid Caliphate.
Ja'far was a paternal cousin of the first two Abbasid caliphs al-Saffah (r. 750–754) and al-Mansur (r. 754–775).
His father, Sulayman died in Basra in October 759 at the age of 59, and was succeeded by several sons, including Muhammad and Ja'far.
[1] His first cousin al-Mansur, appointed him[2] governor of Medina in 763 and he was dismissed in 766/77.