Opposition of socialist East and capitalist West in XX century led to division of nations and creation of new states. Due to historical process Korea and Germany were divided into Democratic People’s Republic of Korea and Republic of Korea, and German Democratic Republic and Federal Republic of Germany, respectively. Development of states required construction of new ethnic identities/ethnicities. In this research through the prism of Cornell and Hartmann’s constructivist approach and stereotype theory secondary and primary data is analyzed.. On the basis of analysis of secondary data this research examines and compares measures that were used by ruling parties of GDR and DPRK in order to create and develop new ethnic identities. Further in paper on the basis of results of interviews and analysis of secondary data is described and compared how West Germans perceive East Germans and how South Koreans perceive North Koreans. According to the results of the research it is possible to state which measures were undertaken by governments of GDR and DPRK in order to create an ethnicity and it is possible to state that West German stereotypes about East Germans and South Korean stereotypes about North Koreans are partly based on ideological/political aspects of divisions of nations.