Regarding the problems and prospects of human self-definition, the unifying thread is "identity" in its various manifestations throughout the life course. Diversity is one of the aspects of Iranian society. This paper presents the findings of a politico - linguistic research conducted in 2006 among the Tat people living in Takistan in Qazvin Province, some 130 kilometres to the north east of Tehran. These people though a minority ethnic group in Iran, constitute the majority population of the city of Takistan and its surrounding vicinity. Tat language which is a member of the South-Western group of the Iranian branch of the Indo-European language family is the great aspect of these people's identity.The operating assumption of the paper is that struggling with different aspects of their identity these people see themselves as entirely distinct group and honour their three thousand years old identity. Of particular interest is the relationship between their perceived differences, actual differences, and geographic location. Interviews, observations and questionnaires were employed to examine the perceived identity of Tats.