According to a 20 10 survey conducted by the Department of Sociology of Tehran University, among all social and economic classes in Tehran, 63% Teherans were born in Tehran, 98% Teherans know Persian, 67% Teherans consider themselves Persian, and 13% Teherans know a little about European languages.
The ethnic and social situation in Tehran changed greatly in A.D. 1980. The Islamic Revolution of 65438-0979 AD led to political, social and economic changes. Many Iranians have left Iran under increasing political, social and religious pressure, and many of them are Teherans. Most of them went to Canada, the United States, France, Sweden and other European countries, and most of them moved to the United States, Canada and France.
Subsequently, the Iran-Iraq war broke out, Iraq invaded Iran, and another group of Tehran residents left to escape the war, especially during the Iraqi air raid on Tehran. At that time, Iraq was supported by world powers, and economic isolation became a more important reason for Tehran residents to leave. After the war, most of them didn't return home after adapting to life in a foreign country. During the war, a large number of residents from western Iran and Iraq bordering southwestern Iran poured into Tehran.
Instability and wars in neighboring Afghanistan and Iraq have led to the influx of millions of refugees into Iran. Tehran attracts workers like magnets to help the city carry out post-war restoration work, and their wages are cheaper than those of local workers. With the assistance of UNHCR, many refugees have been repatriated, but there are still a considerable number of Afghan and Iraqi refugees in Tehran who are unwilling to leave, and they are pessimistic about the future of their motherland. Many Afghan refugees are Hazaras and Tajiks who are familiar with Persian, and they can speak Persian dialect, while Iraqi refugees are mainly Shiite Muslims from Mesopotamia, who are familiar with Arabic.
The Twelve Imams of Islam (the largest sect among Shiites) is the state religion of Iran at present. Most Teherans are considered as moderate followers of the Twelve Imams, but this statement has not been confirmed due to the lack of independent statistics. The minority religious groups in Tehran include Sunni Islam, Sufi Islam, Zoroastrianism, Baha 'i, Judaism, Christianity (including Assyrian Church in the East, Armenian Apostolic Church, Chaldean Catholic Church, Roman Catholic Church, Seventh-day Adventist Church, Iranian Protestant Church, Armenian Evangelical Church, Iranian God Church, Armenian Catholic Church, Russian Orthodox Church and Presbyterian Church), as well as agnostics and atheists. Christian sects still have some influence in Tehran.