Objectives: The main aim goal of this paper is estimating level and distribution of Social capital (SC) in Iran’s provinces. in this research, first, I have reviewed about the theories of the social capital in order to find the best theoretical model for this research. Then, I estimated the amount of the social capital. Method: For this main, we have reviewed theoretical and empirical literature of human capital, and then we used Dugom Method for estimation the level and distribution of social capital in Iran’s Provinces. The Dogum Method has been formed three old methods of social capital estimation. We used latent variable, because social capital is a qualified variable. The study concludes that the social capital in Yazd province is more than other provinces of Iran. Results: The results show that there are positive relation between all of variable which are related to social capital and the formulation of social capital in Iran’s province except crime index