Sifri Khatun (Persian: سیفری خاتون) (Arabic: سفري خاتون) was a Seljuk princess, daughter of sultan Alp Arslan (r. 1063–1072), sister of Malik Shah (r. 1072–1092) and the first wife of Abbasid caliph al-Muqtadi (r. 1075–1094).
[3][1] In 1071–72 the grandfather of al-Muqtadi, Al-Qa'im sent his vazir Ibn Al-Jahir to ask her hand in marriage, to which demand the Sultan agreed.
However, Her father, Alp Arslan died shortly after her marriage in 1072 and her husband al-Muqtadi married another Seljuk princess decade later.
Al-Muqtadi's second wife was Mah-i Mulk Khatun, daughter of Sultan Malik-Shah I.
In March 1082, Al-Muqtadi sent Abu Nasr ibn Jahir to Malik Shah in Isfahan to ask for her hand in marriage.