Persians, Azeris, Kurds, Lurs, Arabs, Baloch, Turkmen and recognized minorities; the Iranian language family — descriptive and neutral. Population shares are contested estimates.
Iran is a multiethnic country in which a Persian-speaking majority lives alongside large minorities including Azerbaijani Turks, Kurds, Lurs, Arabs, Baloch, Turkmen, and others. Population shares are strongly disputed because Iran's official census has not recorded ethnicity or mother tongue since at least 1976. Widely cited unofficial estimates put Persians at roughly 61%, Azerbaijanis at about 16%, Kurds at about 10%, and Lurs, Arabs, and Baloch at a few percent each, but these figures span varying ranges. Absent an ethnic census, all such numbers are estimates and contested.
Persians are Iran's largest ethnic group, predominantly Shia, dispersed across the central plateau and major cities. The name 'Pars' derives from the Fars region of southwestern Iran, the historical cradle of this identity. Persian, a Western Iranian language within the Indo-European family, is the country's official tongue and, under Article 15 of the constitution, the common language of Iranians. For centuries Persian served as a literary lingua franca across much of Asia, and today it is closely related to Dari in Afghanistan and Tajik in Tajikistan. The precise demographic share of Persians is an estimate and contested.
Azerbaijanis are Iran's largest ethnic minority, predominantly Shia, concentrated in the northwest in East and West Azerbaijan, Ardabil, and Zanjan, as well as parts of Hamadan, Qazvin, and Markazi. Their language, Azerbaijani (Azeri Turkish), belongs to the Oghuz branch of the Turkic family, not the Iranian family. Azerbaijanis have long been prominent in Iran's economic, political, religious, and cultural life, and many are bilingual in Azeri and Persian. Estimates put their share at roughly 16%, but like other groups this figure is an estimate and contested.
Kurds are one of Iran's large minorities, concentrated in the west in Kurdistan, Kermanshah, Ilam, parts of West Azerbaijan, and Lorestan. Kurdish belongs to the Northwestern branch of the Iranian languages and has varieties such as Kurmanji, Sorani, and Southern Kurdish; most Iranian Kurds are bilingual. Religiously, Iran's Kurds are mixed: a large share are Sunni (chiefly Shafi'i), while many Feyli Kurds of Kermanshah and Ilam are Shia. Estimates place their share at about 10%, a figure that is an estimate and contested.
The closely related Lurs and Bakhtiari live in the Zagros Mountains of western and southwestern Iran, chiefly in Lorestan, Chaharmahal and Bakhtiari, Kohgiluyeh and Boyer-Ahmad, and parts of Khuzestan and Fars. Luri belongs to the Southwestern branch of the Iranian languages and is close to Persian; according to Encyclopaedia Iranica, Luri dialects closely resemble standard Persian. Lurs are traditionally divided into Lur-e Bozorg (including the Bakhtiari, Kohgiluyeh, and Mamasani) and Lur-e Kuchak, with a tribal social structure. They are predominantly Shia, and many historically followed a nomadic, pastoral way of life.
The Arabs of Khuzestan (Ahwazi Arabs) are Iran's largest Arabic-speaking community, residing mainly in the western half of Khuzestan in the southwest, centered on Ahvaz. According to Encyclopaedia Iranica, an Arab presence in Khuzestan dates back centuries and was reinforced from the 16th century by gradual migration of Arab tribes from Mesopotamia. Most Khuzestani Arabs are Shia, though there are also Sunni, Christian, and Mandaean minorities, and nearly all are bilingual in Arabic and Persian. Population estimates vary widely, commonly cited between 1.5 and 3 million; these figures are estimates and contested.
The Baloch are concentrated mainly in Sistan and Baluchestan in southeastern Iran, on the borders with Pakistan and Afghanistan, where they form the majority alongside a minority of Sistani Persians. Their language, Balochi, belongs to the Northwestern branch of the Iranian languages and includes varieties such as Rakhshani and Sarawani. Unlike Iran's Shia majority, most Baloch are Sunni (predominantly Hanafi), and local culture has close ties to neighboring areas of Pakistan. Human-rights and development reports describe Sistan and Baluchestan as one of Iran's most deprived provinces; claims about the causes and extent of this deprivation can be contested.
The Turkmen are a Turkic, Oghuz-branch people concentrated in northeastern Iran in the Turkmen Sahra (Golestan and adjoining North and Razavi Khorasan), and unlike most of Iran's Turkic-speakers they are generally Sunni. The Qashqai are a Turkic-speaking tribal confederacy in southern Iran, mainly in Fars, formed from the 18th century and traditionally nomadic pastoralists. Iran has historically had significant nomadic and semi-nomadic communities, many of whom have shifted in recent decades to settled life. These groups form part of Iran's ethnolinguistic diversity, and precise population figures are estimates and contested.
Under Article 13 of the Islamic Republic's constitution, Zoroastrian, Jewish, and Christian Iranians are the only recognized religious minorities, free within the law to perform their rites and follow their own personal-status rules. Armenians and Assyrians are two Christian communities with distinct ethnolinguistic identities and ancient churches. These minorities hold five reserved seats in the Majlis: two for Armenians and one each for Assyrians (with Chaldeans), Jews, and Zoroastrians; the arrangement traces to the 1906 Constitutional era. By contrast, some other religious groups such as the Bahá'ís are not recognized and have no parliamentary seats.
Iran's largest language grouping is the Iranian branch of Indo-European — Persian, Kurdish, Balochi, Luri, and the Caspian languages (Gilaki and Mazandarani); next is the Turkic family (Azeri, Turkmen, Qashqai), then Arabic in Khuzestan. Article 15 designates Persian as the official and common language, while permitting regional and ethnic languages in the press and media and 'the teaching of their literature' in schools alongside Persian. In practice there is a gap between text and implementation, and the extent and form of mother-tongue education is strongly contested; critics complain of restrictions while officials sometimes cite security concerns. Bidar reports this descriptively and takes no position on autonomy or separatism.