Abstract: The ethnic structure of this region has been heavily influenced by the evolution of the various historico-geographical factors and policies. Most of this structure, however, is linked to the evolution of the denominational structure. Ethnicity in this case is closely related to religion. The political reality, the events with political overtones that occurred during these centurieshad a direct influence regarding the conduct of processes and phenomena related to the ethno-confessional evolution of the area subject to our research. In this period the region is part of the Austrian state (before 1867), Austro-Hungarian Empire (1867 to 1918), Hungary (1940-1944) and Romania (1918-1940, 1944 - present). This space is located in the western area and it is mainly inhabited by Romanians. The continuous presence of Romanians here is documented ever since its formation. The ethnic group of Romanians has been facing a considerable demographic pressure that came from the Hungarians (the neigh