Abū al-Walīd Ṣāliḥ ibn ʿAbd al-Rahmān al-Sijistānī (Arabic: صالح بن عبدالرحمن‎) (died 721–724) was a leading bureaucrat in the central dīwān (tax bureau) of Iraq under the Umayyad governor al-Hajjaj ibn Yusuf (694–714) and then fiscal governor of the province under Caliph Sulayman ibn Abd al-Malik (r. 715–717). In 697, upon al-Hajjaj's order, he carried out the conversion of the Persian-language Iraqi dīwān into Arabic.