The article was published in Polish in "Studia Regionalne i Lokalne", 1/2006   The paper discusses the findings from a survey conducted on representative samples from three historically dissimilar regions of Poland (Eastern Poland, Galicia, western and northern regions) and two in Ukraine (western and eastern Ukraine). It outlines the results of analyses investigating regional disparities in Poland and Ukraine, and similarities shared by all the five regions in terms of different aspects of local and national identity, taking into account the role of objective factors affecting regional disparities (mainly urbanisation rates). A series of cluster analyses has proven that the area of Poland is much more homogeneous than that of Ukraine. Likewise, western Ukrainians showed more similarity to the inhabitants of eastern and south-eastern regions of Poland than to the eastern parts of Ukraine.