The phenomenon of unplanned housing (Slums) is a global phenomenon that has spread widely in all third world countries, especially countries that are in difficult conditions due to natural disasters or wars. This research aims at highlighting on this population problem in Iraq, which was emerged since year 2003 and spread in all cities of the country. The phenomenon had led to the distortion of most Iraqi cities, especially in the province of Najaf. In this study, Najaf slums were studied regarding their locations, development, and distribution, and were compared to condition in year 2003 by ArcMap10.2. The study showed that the lack of state authority on the land as well as the weakness of the laws and regulations in the country this problem.