linguistic:paraphrasing
Ethnic groups

Ethnic group composition remains a point of debate, mainly regarding the largest and second largest ethnic groups, the Persians and Azerbaijanis, due to the lack of Iranian state censuses based on ethnicity. The World Factbook has estimated that around 79% of the population of Iran is a diverse Indo-European ethno-linguistic group, with Persians (including Mazenderanis and Gilaks) constituting 61% of the population, Kurds 10%, Lurs 6%, and Balochs 2%. Peoples of other ethnolinguistic groups make up the remaining 21%, with Azerbaijanis constituting 16%, Arabs 2%, Turkmens and other Turkic tribes 2%, and others (such as Armenians, Talysh, Georgians, Circassians, Assyrians) 1%.

The Library of Congress issued slightly different estimates: 65% Persians (including Mazenderanis, Gilaks, and the Talysh), 16% Azerbaijanis, 7% Kurds, 6% Lurs, 2% Baloch, 1% Turkic tribal groups (including Qashqai and Turkmens), and non-Iranian, non-Turkic groups (including Armenians, Georgians, Assyrians, Circassians, and Arabs) less than 3%.