Iranians have a very strong sense of class structure. In the past they referred to their society as being divided into tiers, or tabagheh, which were identified by numbers: the first tier corresponded to the upper classes the second, to the middle classes and the third, to the lower classes. Under the influence of revolutionary ideology, society is now perceived as being divided into the wealthy, a term generally prefixed with negative adjectives the middle classes and the mostazafin, a term that literally means disinherited. In reality, Iranian society has always been more complex than a three-tier division implies because each of the three broad classes is subdivided into several social groups. These divisions have existed in both urban and rural areas.

Data as of December 1987