The amount of waste generated is rapidly increasing with the increasing population. Moreover, urban life trends boost consumption, thus amount of waste increases. As a result, waste management became an important issue for people and environmental health. In this study firstly, the criteria that used in the literature for solid waste landfill site selection are determined and evaluated. Then additional criteria are proposed and evaluation methods of the criteria are examined. After that, a view of solid waste management over an extended supply chain structure is demonstrated and the extended supply chain is examined in terms of additional flows and responsibilities. Geographical Information System (GIS) based approach is used to process the criteria and identify candidate facility locations. Besides, Mathematical Modelling is used for examining the logistics related criteria. Then Analytical Hierarchy Process (AHP) and analytical methods used to decide on the most suitable location for the landfill site.