The paper uncovers determinants of turnout in Iran by studying the role of institutional and socio-economic variables in parliamentary politics since the 2000s. The paper argues that Iran’s electoral system has dichotomized the pattern of participation between center and periphery. The dynamic of participation in the center stems primarily from national shifts in the factional rule. However, in provincial peripheries, Iran’s electoral system promotes the personal particularistic demands of voters in the MP-citizen linkage. In this environment, the discretionary power of local state machinery over the daily lives of provincial citizens lays the ground for the role of local bureaus to influence participation. This argument draws on statistical analysis of parliamentary turnout and the study of several Iranian newspapers and official reports. The findings of the paper suggest a new mechanism by which institutional settings may shape the pattern of participation more generally.