Effective decision-making is one of the most crucial tasks for municipal managers in the face of increasing urban management complexities. In this context, Information Technology (IT) and Information Systems (IS) play a decisive role in improving the quality and speed of decision-making. The objective of this research is to explain the effect of IT and IS on the decision-making process in municipal management. This research is applied in purpose and descriptive-survey in nature. The statistical population of the research includes managers, experts, and staff related to the managerial, financial, and IT domains in the Tabriz Municipality. Data collection was carried out through a questionnaire based on theoretical foundations and previous studies, and the validity and reliability of the research tool were confirmed using standard methods. For data analysis and testing the relationships between variables, Structural Equation Modeling (SEM) with the Partial Least Squares (PLS-SEM) approach and SmartPLS software were used. The research findings indicate that IT and IS have a significant impact on improving the decision-making process of municipal managers. They facilitate more informed and effective decision-making by enhancing access to timely information, increasing information accuracy and comprehensiveness, and reducing uncertainty. The results of this research can provide a suitable basis for policymakers and urban managers to make targeted investments in IT infrastructure and develop IS within municipalities.