Municipal solid waste Sanitary landfill site selection is challenging problem to the developing countries. Present study focuses on the selection of a criteria’s to select best suitable landfill site for Solid Waste Management (SWM) which is an important component of urban planning. The problem of SWM has assumed a significant proportion for the municipal authorities in the wake of rapid industrialization, urbanization, and the resultant pressure on existing resources, while planning for suitable sites various factors need to be considered for sanitary landfill site selection. To identify a suitable landfill site conventional process takes huge time for analysis. In this study, the selection of a landfill site in an urban area like Nashik is a captious issue due to the involvement of a multitude of parameters. The decisive parameters are environmental, economic, and social in nature, some of them conflicting, which makes landfill site selection a tedious and complex process. This study concentrates on the Rationalization of Factors affecting the selection of sanitary landfill sites the relative Important Index (RII) is used to determine the most important factors from different parameters with multicriteria technique AHP with validation, thirty factors were weighed for analysis, and the ten most important factors are identified with their acceptable weights.