Al-Ashraf Salāh ad-Dīn Khalil ibn Qalawūn (Arabic: الملك الأشرف صلاح الدين خليل بن قلاوون‎‎); (c. 1260s – 14 December 1293) was the eighth Mamluk sultan between November 1290 until his assassination in December 1293. He was well known for conquering the last of the Crusader states in Palestine in the capture of Acre in 1291.

Khalil's exact year of birth is not known, although according to the Mamluk-era historian, Khalil ibn Aybak as-Safadi, he died "in his thirties or less". He was the second eldest son of Sultan Qalawun (r. 1279–1290) and his mother was a woman named Qutqutiya. Khalil had three brothers, as-Salih Ali, an-Nasir Muhammad and Ahmad, and two sisters. In 1284, Khalil married Ardukin, the daughter of Sayf ad-Din Nukih ibn Bayan, a Mongol emir of Qalawun. As-Salih Ali, al-Ashraf Khalil's brother, married Ardukin's sister, and both wives were chosen by Qalawun's second wife because of their Mongol ethnicity, which was considered prestigious by the Mamluks. Khalil had two daughters with Ardukin, who are unnamed in the Mamluk sources.

Qalawun had proclaimed as-Salih Ali as his heir apparent in 1280. From that point on, as-Salih Ali's name was added next to Qalawun's name in treaties. Khalil's name also began to be added to treaties in the regal style of "al-Malik al-Ashraf" starting in 1285 in the treaty between Qalawun and the king of Lesser Armenia. When as-Salih Ali died in 1288, Qalawun appointed al-Ashraf Khalil as his co-sultan. While al-Ashraf Khalil's name was read alongside Qalawun's name in the khutba (Friday prayer sermon) and the emirs swore their allegiance to him, Qalawun did not sign the ahd (diploma of investiture) confirming al-Ashraf Khalil's appointment. The reason for Qalawun's apparent hesitance is not clear, but he may have considered al-Ashraf Khalil unsuitable for the sultanate or was wary of the enmity between al-Ashraf Khalil and the na'ib as-saltana (viceroy of Egypt), Emir Husam ad-Din Turuntay, who had been a strong advocate for as-Salih Ali's accession.

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