The Arab world has played a very important role in the history of urbanization. It is the region where urban civilization was born and where urban matters have been addressed for centuries. The Arab urban civilization, as it has evolved over the past millennium, has generated some of the most beautiful cities in the world. This publication is the first ever to comprehensively analyze urbanization processes in the Arab States through the review of its four sub-regions: the Maghreb, the Mashreq, the Gulf Cooperation Council countries and the least-developed Arab countries of the Southern Tier.