The Institute for Migration and Ethnic Studies is the only scientific institution in Croatia that for almost thirty years systematically and continuously, using interdisciplinary approach, deals with research on all kinds of population migration, study on minorities (both in Croatia and Croatians as minority groups abroad) and various kinds of ethnic issues. All these topics have become extremely important for the Republic of Croatia in the last twenty years in regard to historical circumstances, above all problems following the dissolution of the former state, changes of borders and consequences of the Croatian War of Independence resulting in various kind of migration. Some of the issues are becoming more important in the process of the near Croatian accession to the European Union. Namely, along with past migration movements, the Croatian integration process into the EU opens new migration topics in the field of migration and ethnicity: different position of Croatian citizens in the European space (new education and economic migration), the problem of old and new minorities, new forms of trans-border cooperations, the position of Croatia as immigration country (expected new immigration from poor and undeveloped countries from the territory of Africa and Asia – temporary and permanent, and consequently not the question just of ethnic but also of race studies), the creation of new Croatian migration policy, the creation of integration policy, transnational migrations, increasingly important issues of asylum and many other.