The Kurds speak a variety of closely related dialects, which in Iran are collectively called Kirmanji. The dialects are divided into northern and southern groups, and it is not uncommon for the Kurds living in adjoining mountain valleys to speak different dialects. There is a small body of Kurdish literature written in a modified Arabic script. Kurdish is more closely related to Persian than is Baluchi and also contains numerous Persian loanwords. In large Kurdish cities, the educated population speaks both Persian and Kurdish.

There are approximately 4 million Kurds in Iran. They are the third most important ethnic group in the country after the Persians and Azarbaijanis and account for about 9 percent of the total population (see Turkic-speaking Groups , this ch.). They are concentrated in the Zagros Mountain area along the western frontiers with Turkey and Iraq and adjacent to the Kurdish populations of both those countries. Kurds also live in the Soviet Union and Syria. The Kurdish area of Iran includes most of West Azarbaijan, all of Kordestan, much of Bakhtaran (formerly known as Kermanshahan) and Ilam, and parts of Lorestan. Historically, the Kurds of Iran have been both urban and rural, with as much as half the rural population practicing pastoral nomadism in different periods of history. By the mid-1970s, fewer than 15 percent of all Kurds were nomadic. In addition, during the 1970s there was substantial migration of rural Kurds to such historic Kurdish cities as Bakhtaran (known as Kermanshah until 1979), Sanandaj, and Mahabad, as well as to larger towns such as Baneh, Bijar, Ilam, Islamabad (known as Shahabad until 1979), Saqqez, Sar-e Pol-e Zahab, and Sonqor. Educated Kurds also migrated to non-Kurdish cities such as Karaj, Tabriz, and Tehran.

There are also scatterings of Kurds in the provinces of Fars, Kerman, and Baluchestan va Sistan, and there is a large group of approximately 350,000 living in a small area of northern Khorasan. These are all descendants of Kurds whom the government forcibly removed from western Iran during the seventeenth century.

Most of the rural Kurds retain a tribal form of social organization, although the position of the chief is less significant among the majority of Kurds who live in villages than it is among the unsettled pastoralists. An estimated forty Kurdish tribes and confederations of tribes were still recognized in the mid-1980s. Many of these were organized in the traditional manner, which obligated several subordinate clans to pay dues in cash or produce and provide allegiance to a chief clan. The land reform program of the 1960s did not disrupt this essentially feudal system among most tribally organized Kurds.

The majority of both rural and urban Kurds in West Azarbaijan and Kordestan practice Sunni Islam. There is more diversity of religious practice in southern Kurdish areas, especially in the Bakhtaran area, where many villagers and townspeople follow Shia beliefs. Schismatic Islamic groups, such as the Ahl-e Haqq and the Yazdis, both of which are considered he46e heretical by orthodox Shias, traditionally have had numerous adherents among the Kurds of the Bakhtaran region. A tiny minority of Kurds are adherents of Judaism.

The Kurds have manifested an independent spirit throughout modern Iranian history, rebelling against central government efforts to restrict their autonomy during the Safavid, Qajar, and Pahlavi periods. The most recent Kurdish uprising took place in 1979 following the Revolution. Mahabad, which has been a center of Kurdish resistance against Persian authority since the time of the Safavid monarch Shah Abbas (1587-1629), was again at the forefront of the Kurdish autonomy struggle. Intense fighting between government forces and Kurdish guerrillas occurred from 1979 to 1982, but since 1983 the government has asserted its control over most of the Kurdish area.

Data as of December 1987