Los Angeles, Southern California. Called "Tehrangeles". see this link: http://www.npr.org/templates/story/story.php?storyId=5459468

Table 3. Top 10 Destination Countries by Size of Iranian-Born Population United States 291,040 Canada 75,115 Germany 65,750 Sweden 53,982 Israel 51,300 United Kingdom 42,494 Netherlands 21,469 Australia 18,789 France 18,376 Armenia 15,999 Source: University of Sussex, 2000 Global Migrant Origin Database

Michigan

If you are talking about the Iranian-born, there are many in the United States. But there are more people of Iranian ancestry in the United Arab Emirates (UAE). 1) "The term Iranian citizens abroad or Iranian/Persian diaspora refers to the Iranian people born in Iran but living outside of Iran with their children. By most estimates, between two and three million Iranians live in North America, Europe, Persian Gulf States, Turkey and Australia (2008). For the most part they emigrated after the Islamic revolution in 1979. A small percentage has returned to Iran since." "Country[a] Iranian-born [b] Residents of Iranian ancestry [c] United States 283,225 (2000)[e] 338,266 (2000)[de] UAE ? 400,000 (2008)[d] Canada 95,420 (2006) 121,505[d](99,225 as single response and 22,280 among multiple responses) Qatar 73,000 (1993) Germany 65,750 (2000) Kuwait 60,000 Sweden 53,892 (2000) 12,464 (2003)[b] Russia 50,000 Bahrain 48,000 (1998) Israel 47,800 (2007) 135,000 (2007)[d] United Kingdom 42,494 (2000)" "Notes: Note a: The Iranian citizens abroad differ from the other Iranian peoples living in other areas of Greater Iran, who are of related ethnolinguistical family, speaking languages belonging to the Iranian languages, which is a branch of Indo-European languages. There are an estimated 150 to 200 million native speakers of Iranian languages (including 70 million in Iran as of 2006), the five major groups of Persians, Lurs, Pashtuns, Kurds and Baloch accounting for about 90% of this number. Currently, most of these Iranian people live in Iran, Afghanistan, Tajikistan, Pakistan, parts of Uzbekistan (especially Samarkand and Bukhara), the Caucasus (Ossetia and Azerbaijan) and the Kurdish areas (referred to as Kurdistan) of Turkey, Iraq, Iran and Syria. Smaller groups of Iranian people can also be found in western China, southern Pakistan and a few in western India. Due to recent migrations, there are also large communities of speakers of Iranian languages in Europe, the Americas, and Israel. Note b: In some countries naturalized citizens, dual citizens, or children with only one Iranian/foreign-born parent are counted (for statistical purposes) as citizens/nationals of the host country only (i.e. citizen of the country of residence). For example all naturalized Swiss citizens have a legal "Swiss origin" even though it is often not the same as their place of birth. Note c: Same as "Iranian-born" but includes their children born abroad. Note d: Iranian ancestry (i.e. second or third generation), not necessarily Iranian citizenship. Note e: In the period from 1961 to 2005, the United States has been the main destination of Iranian emigrants. A total of 378,995 Iranians have immigrated to the United States in that period, where the major concentrations of Iranian immigrants are California (158,613 Iran-born in 2000), New York state (17,323), Texas (15,581), Virginia (10,889), and Maryland (9,733) Los Angeles Metropolitan Area was estimated to be host to approximately 114,712 Iranian immigrants, earning the Westwood area of LA the nickname Tehrangeles. In the case of the United States, the US Census Bureau's decennial census form does not offer a designation for individuals of Iranian descent. Consequently, it is estimated that only a fraction of the total number of Iranians are writing in their ancestry. The Census Bureau estimates that the Iranian-American community (including the US-born children of the Iranian foreign born) numbers around 330,000. However, studies using alternative statistical methods have estimated the actual number of Iranian Americans in the range of 691,000 to 1.2 million." Source and further information: http://en.wikipedia.org/wiki/Iranian_citizens_abroad 2) "Channel One TV is one of several Farsi-language TV and radio outlets in the city that are bringing news, images and the voices of political turmoil in Iran to a worldwide audience, including Iranians subjected to a government-imposed media blackout in their own country. Those satellite TV and radio stations have long served as fixtures in the social fabric of L.A.'s well-heeled Iranian community, dubbed "Tehrangeles" because it is home to the world's largest concentration of ethnic Iranians outside Iran." Source and further information: http://www.reuters.com/article/domesticNews/idUSTRE55H0GE20090618 3) "According to the most recent rounds of government census data, the largest number of Iranians outside of Iran reside in the United States, followed by Canada, Germany, Sweden, and Israel (see Table 3); the United States is home to more than three times the number of Iranian born living in Canada, the country with the next largest Iranian-born population. Yet it is important to note that members within the Iranian community claim their numbers are much larger than census data suggest. In the case of the United States, the US Census Bureau's decennial census form does not offer a designation for individuals of Iranian descent. Consequently, it is estimated that only a fraction of the total number of Iranians are writing in their ancestry. The Census Bureau estimates that the Iranian-American community (including the US-born children of the Iranian foreign born) numbers around 330,000. However, studies using alternative statistical methods have estimated the actual number of Iranian Americans in the range of 691,000 to 1.2 million. Given that the Iranian community in the United States is significantly larger than those in other countries, it is worth noting the distribution and characteristics of this particular population. Iranian Americans are most highly concentrated in California, which has a larger Iranian population than the next 20 states combined. Within California, most Iranians live in the Los Angeles area, dubbed Tehrangeles." "Table 3. Top 10 Destination Countries by Size of Iranian-Born Population United States 291,040 Canada 75,115 Germany 65,750 Sweden 53,982 Israel 51,300 United Kingdom 42,494 Netherlands 21,469 Australia 18,789 France 18,376 Armenia 15,999 Source: University of Sussex, 2000 Global Migrant Origin Database" Source and further information: http://www.migrationinformation.org/profiles/display.cfm?ID=424

In America, Los Angeles.