Background and Objectives: Social capital is one of the main factors that influences on the social and welfare development.
This research discusses the influential factors in forming social capital among the youths who are 18 to 29 in Ilam city. The method of studying in this research is the method: kind of surveying in which the questionnaire has been applied the sample population is 400 people. That the cluster sample from the kind of multi phases has been applied for selecting them.
Results: The result shows that all of the variables have a meaningful relation with the social capital except education and occupation on the whole.
Seven hypotheses are confirmed out of nine, and one hypothesis is rejected. It means that there is no meaningful relation between social capital and education and occupation
Discussion: on base of researches have already shown that all of the variables have a meaningful relation with the social capital and their theories have been used in this research.
Results: in order to increase social capital is planning in the field of formal and informal participation for young generation should be done. According to effect of immigration on social capital planning should be done for prevention of immigration to cities.