Khalid ibn al-Walid ibn al-Mughira al-Makhzumi (; died 642) was an Arab Muslim commander in the service of the Islamic prophet Muhammad and the caliphs Abu Bakr (r. 632 - 634) and Umar (r. 634 - 644) who played a leading role in the Ridda wars against rebel tribes in Arabia in 632-633 and the early Muslim conquests of Sasanian Iraq in 633-634 and Byzantine Syria in 634-638.