OICC Press International Journal of Political Science 2228-6217 14 3 2024 09 21 Studying the Effect of Political Participation on the Performance of Government Institutions (Accountability and Efficiency) A case study of Kermanshah city 1 21 EN Fatemeh Mansouri Department of Political Science, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran, Iran. Corresponding Author Iraj Ranjbar Department of Political Science, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran. Hamid Reza Saeedy Nejad Department of Political Science, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran Journal Article 2024 09 21 The upcoming article examines the relationship between the political participation index and the responsiveness and efficiency of government institutions. The independent variable is both formal and informal political participation, and the dependent variable is the responsive-ness and efficiency of government institutions. Research Method: The method employed in the article is quantitative, using a questionnaire as the tool. The research population consists of individuals aged 18 to 65 residing in the city of Kermanshah. According to the latest census, there were 952,287 people in this population. Using Cochran's formula, a sample of 384 individuals was selected, and the relationship and ratio between the independent and dependent variables were assessed using multiple regression analysis. Research Findings: The results indicate that both formal and informal political participation have a significant impact on im-proving the performance of government institutions. With an increase in the level of participation, the responsiveness and efficiency of government institutions will also improve. The research findings suggest that the average level of formal and informal political participation in Kermanshah is not at a desirable level. The obtained average scores regarding the performance of government institutions (responsiveness and efficiency) also have a low level. Additionally, the formal political participation variable has a greater impact compared to informal political participation.