Objectives: Social security is a key factor in human life. Despite its importance, only recently, sociologists carried out research about it. In this study, we try to define societal security and conduct a comparative study about it. We try to measure the level of societal security in different regions of Tehran and then to compare them. Method: The research is carried out in two regions of Tehran (south and north), and the main tool is questionnaire. The sample size is 420. Finding & Result: It shows that each region has its own level of societal security. The global index shows that in the north, the level of societal security is significantly higher than the south. To live in the north of Tehran, produce less emotional Security on the contrary, in the south financial and professional security is significantly lower. Societal Security is a Socio-cultural Phenomenon, therefore, its realization needs the collaboration of the whole social network.