The Hashemite Arab Federation was a short-lived confederation that lasted from 14 February to 2 August 1958, between the Hashemite kingdoms of Iraq and Jordan. Although the name implies a federal structure, it was de facto a confederation.

The Federation was formed on 14 February 1958, when King Faisal II of Iraq and his cousin, King Hussein of Jordan, sought to unite their two Hashemite kingdoms as a response to the formation of the United Arab Republic between Egypt and Syria. The union lasted only six months. Faisal II was deposed by a military coup on 14 July, and the new Iraqi government officially dissolved the Federation 2 August 1958.