ABSTRACT This study introduces a comprehensive Geographic Information System – Multi Criteria Decision-Making (GIS-MCDM) framework to identify and evaluate potential municipal landfill sites in Nashik, India. The approach integrates topographic, geomorphological, environmental, and infrastructure criteria to create thematic raster layers representing suitability for landfill development. Criteria include ground slope, elevation, land use, proximity to water bodies, land value, and infrastructure proximity. The Analytical Hierarchy Process (AHP) was employed to determine the relative weights of these criteria, facilitating the computation of the Landfill Suitability Index (LSI) and the creation of a suitability map. The analysis classified the 480 sq. km study area into five categories, with 6.79% of the area deemed “Very High” suitability. The TOPSIS method ranked 16 potential sites within high-suitability regions, identifying L10 near Adagaon as the most optimal site. Sensitivity analysis confirmed the stability of site rankings under various weight adjustments, providing robust tool for evidence-based landfill site selection.