Source: Wikipedia - Tehrangeles is a portmanteau deriving from the combination of Tehran, the capital of Iran, and Los Angeles.
It is used when referring to the large number (estimates range from 500,000 to 600,000) of former Iranian nationals and their descendants residing in the Los Angeles metropolitan area; it is the largest such population outside of Iran. In common usage, it usually refers to the proportionally larger Persian-American subset of Iranian immigrants, many of whom are second generation citizens. This area is now officially recognized by the City of Los Angeles as "Persian Square". Thanks to the many efforts of residents, business owners and Councilman Paul Koretz's office.
The Persian community in the L.A. area originally centered in the Westwood neighborhood of west Los Angeles, particularly Westwood Boulevard between Pico Boulevard and the UCLA campus, often referred to as Little Persia or Persian Hills/Persian Square. It is between Beverly Hills and West Los Angeles. Immigration to the area increased several-fold due to the events surrounding the 1979 Iranian Revolution. Westwood Boulevard became known for its many Persian shops and restaurants; and the Persian expatriate community of Los Angeles entered all forms of media including magazines, newspapers, radio and television stations.
As the population grew, many Iranians have moved all over Los Angeles, with other large neighborhoods forming in the Los Angeles neighborhoods of Woodland Hills and Encino in the San Fernando Valley and Beverly Hills, California ; the city of Irvine as well throughout Orange County and Persians also made their homes in San Diego and the Palm Springs area (Coachella Valley). The Persian population of Beverly Hills may be as high as 40% of the total population. The vice mayor of Beverly Hills, Jim Delshad, is Iranian-born.