Jordan, Arab country of Southwest Asia, in the rocky desert of the northern Arabian Peninsula.

The capital and largest city in the country is Amman—named for the Ammonites, who made the city their capital in the 13th century bce. Amman was later a great city of Middle Eastern antiquity, Philadelphia, of the Roman Decapolis, and now serves as one of the region’s principal commercial and transportation centres as well as one of the Arab world’s major cultural capitals.