This study aimed to select a suitable location for the landfill site of hazardous waste in Qazvin province. The study area maps were first updated using satellite imagery. Effective criteria for landfill selection were formulated using the Delphi questionnaire and prioritized by ANP using library studies and standards of relevant and global organizations as well as assessing area conditions and effective factors. The digital information layers were introduced into GIS and weighting and modifications to the information layers and considering the minimum area were determined, suitable locations for landfilling of special waste. The obtained sites were screened, inappropriate references were screened and 9 sites were selected as the best site using criteria and constraints obtained and adapted to the ground reality and environmental conditions. Based on the results of the layers overlap, none of the selected points had a value of one and the selected locations had a maximum score of 4.78. Finally, using TOPSIS software, prioritization was made between the selected options and the third site was identified as the best location for the landfill site.