The emergence of multi-cultural societies and global cities are among the important indicators of globalization, which is marked by extensive immigration process around the world. Based on international data, nowadays, one out of every thirty-five people is living away from his homeland. In this respect, the United Nation has called current century an era of the greatest human displacement in the history of humanity. Although there is no precise statistics about Iranians residing abroad, but according to high council of Iranians in presidential institution, five million Iranians are dispersed around the world. Thus, studying migrants' social problems at their destination is quite essential, because most investigations on Iranians' immigration have focused on measuring their motivations and tendencies (potential immigrants) at the origin, with a general focus on elite migrants. This research employs mixed methods research that integrates questionnaire, narrative interviews, observations, and participant observations. This paper mainly focuses on issues such as the Iranians' diaspora and a brief account of the present status of Iranian immigration to other parts of the world. Furthermore, it investigates social problems of Iranian immigrants in Sweden, including their employment, marriage, divorce, promoting education after immigration, immigration periods and reasons, satisfaction of life (family, income, job), immigrants notion about the behavior of the host society toward them, adaptation, feeling as outsiders, and their willingness to return to the homeland.