Abstract
The books of the prolific Arab-islamic geographical heritage represent the products of Arab geographers and travelers through their numerous trips and documented through them the multiple observations that resulted from their visit to many places. Its beginnings are the center of prosperity and growth of human civilization. When travelers moved between cities for commercial or other purposes, they knew the Iraqi cities they visited, as they got to know their locations and geographical nature, as well as their importance in terms of size and its relationship to geographical location, not to mention their of city planning processes. In which the natural geographical foundations had an important role, and as a result of the originality of these geographical observations because they represent the Arab-Islamic civilizational values, it was necessary to stop at one of the most important travelers, Yaqout Al-Hamawi, and focus on his book (Dictionary of Countries), which this research relied on as a basic source, and Yagout lived Al-Hamawi in the seventh century AH and he died in the city of Aleppo in the year 626 AH/1228 AD. Therefore, this research came to study the geographical location and its impact on the size of the cities at Yakut al-Hamawi
