Amr ibn al-'Ās (Arabic: عمرو بن العاص) (d. 663 CE) was an Arab military commander who is most noted for leading the Islamic conquest of Egypt in 640-41.

Amr was a contemporary of Muhammad, the prophet of Islam, who rose quickly through the Makkan heirarchy following his conversion to Islam in the year 8 AH (629 CE). Amr was dispatched by Muhammad to Oman and played a key role in the conversion of the leaders of that nation, Jayfar and 'Abbād bin Julanda.

Amr was sent by the Caliph Abū Bakr with the Arab armies into Palestine following Muhammad's death. It is believed that he played an important role in the Arab conquest of that region, and he is known to have been at the battles of Ajinādayn and Yarmūk, as well as the fall of Damascus.

Amr is most famous for being the general who conquered Egypt. The Arab armies under his command arrived at Babylon (near the present site of Cairo) in the winter of 640-41. Following the (relatively bloodless) conquest of this area, Amr's armies established a stronghold named Misr al-Fustat ("The tented city") from which "Misr," the Arabic name for Egypt, is derived. The first mosque in Egypt was named for Amr, and still exists in the southern part of Cairo. Al-Fustāt was eventually absorbed into Cairo by the 12th century CE.

Amr went on to lead the conquest of Alexandria in 642, with, it is believed, the assistance of the Coptic Christian population of Egypt who were frequently persecuted by the Byzantine governors at Alexandria.

After the conquest of Egypt, Amr was recalled to the capital (which had, by then, moved from Makkah to Damascus). He played a significant military role at the "Battle of the Camel" at Karbala, which resulted in the final schism between Shi'i and Sunni Muslims.

Amr died in 663, and was believed to be over ninety years old at the time of his death.