Nasir ad-Din al-Malik al-Mansur Ibrahim bin Asad ad-Din Shirkuh better known as al-Mansur Ibrahim (Arabic: المنصور إبراهيم‎‎ d. June 28, 1246) was a Kurdish ruler, the emir ("governor") of the Homs principality from 1240 to 1246 under the Ayyubid dynasty. He held Homs with relative independence, but initially he was under the command of as-Salih Ismail of Damascus. He would later fight against as-Salih Ismail and his Khwarezemid allies—al-Mansur confronted the latter in 1241, 1242, 1244, and 1246.

In January 1241, al-Mansur was appointed commander-in-chief of the allied Ayyubid-Seljuk forces, and pursued any Khwarezimid army that crossed the Euphrates, pillaging several Syrian towns. Al-Mansur caught up with them at Raqqa, but could not prevent them from retreating back to their base in Harran to regroup. On April 25, al-Mansur managed to draw the Khwarezemids into a pitched battle near Edessa and defeated them decisively. Surviving Khwarezemid soldiers fled to Harran where they gathered their families and moved south to territory controlled by the Abbasid Caliphate. Most of the captured territory was taken by the Ayyubids of Aleppo and the Seljuks, but al-Mansur annexed al-Khabur and Qarqisiyya to his own principality. He joined forces with the Seljuk army and together they overwhelmed the fortress of Amid held by the sultan as-Salih Ayyub who attempted to hold Syria and al-Jazira for his Ayyubid Egypt. In al-Mansur's campaign, all of Ayyub's possessions, except for Hisn Kayfa, were taken.

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