Abstract The purpose of this study is to study the effect of social capital, the use of mass media and ethnic identity on the political participation of citizens over 18 years of age and living in the eight districts of Ahvaz municipalities. To describe and explain political participation in the theoretical framework of this research, theories of 1- Theory of usefulness of political participation 2- Theory of social network 3- Theory of political trust 4- Theory of economic and class situation have been used. The sample size of this research was equal to 384 people, which was obtained using Cochran's formula and among the residents of streets, neighborhoods and eight areas of Ahvaz Municipalities, randomly and by multi-stage cluster sampling method. The data of this research have been collected in a survey using a researcher-made questionnaire.And SPSS software was used to analyze the data of this research. According to the data related to the regression table of this study, the independent variables of social capital, mass media use and ethnic identity had the greatest impact on the dependent variable of the study, namely the political participation of citizens over 18 years of age in Ahvaz. پرونده مقاله