Objectives: Theoretical framework section of paper reviewed Theories of Putnam, Colman, Paxton, Portes, Iyer et al and development Indicators of Rafiee’s research used as development degree criteria in Tehran's 22 municipal districts. The paper discussed about relation of Tehran’s 22 municipal districts development and social capital of municipal districts. Method: Sample of this survey selected by PPS method of sampling between over 16 years old with1759 Individuals. Findings & Results: Results of research demonstrated that there are positive significance relations between social capital and its sub indicators as Generalized Trust, Attention, Formal Participations, and Reciprocal Informal Participation with Development degree of municipal districts and a negative significance relation between Informal Religious Participation and Development degree of municipal districts and there is no any relations between Institutional Trust and Charity Informal Participation with Development degree of municipal districts.