The rapid growth of municipal solid waste (MSW) is considered one of the greatest environmental challenges in both developed and developing countries. Among the numerous approaches in solid waste management, the sanitary landfill is still the most common in many countries, including Iran. The multiplicity of factors affecting MSW landfill siting on the one hand, and the importance of applying an efficient method on the other, has led to conducting multi-criteria decision-making integrated with geographic information system (GIS) to evaluate Hassan-Abad land capability. Therefore, 20 criteria were categorized into ecological and socio-economic classes, and the analytical network process model was used to compute the weights. Statistics show that the most considerable items in landfill siting are distance from roads and built-up areas and soil with weights of 0.080466, 0.074147, and 0.062027, respectively. Moreover, the final capability map generated by the weighted linear combination method represents that 82% of the study area has no capability for landfill siting, while low, moderate, and high capability classes cover 12%, 5%, and 1% of Hasan-Abad, respectively. The results indicate the efficiency of the integrated method in land capability assessment for MSW landfill siting.