<B>Background</b><br />
We study identity in the context of long-term sedentary groups in Eastern Europe in contrast to the frequently studied short-term immigrants in typical Western European or US American contexts. This paper provides a novel approach to youth identity in an Eastern European post-communist context for minority groups that are quite distinct from the mainstream group to advance the study of identity. Turkish-Bulgarians and Muslim-Bulgarians have been subjected to extensive assimilation campaigns, which prompted them to carefully negotiate their ethnic identity and sense of belonging.<br />
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<B>Participants and procedure</b><br />
Participants were 366 adolescents aged 16 to 18 years (M = 16.72, SD = 0.71) from South Central and South Western regions of Bulgaria. This sample included Turkish-Bulgarian (n = 145), Muslim-Bulgarian (n = 85), and (mainstream) Bulgarian (n = 136) youth who provided data on personal, ethnic, familial, and religious identity as well as psychological well-being.<br />
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<b>Results</b><br />
Turkish-Bulgarian youth scored higher on achievement, diffusion, and foreclosure but lower on moratorium and Bulgarian ethnic and familial identity than Muslim-Bulgarian and Bulgarian youth. Bulgarian mainstreamers scored significantly lower on religious identity compared to their Turkish-Bulgarian and Muslim-Bulgarian peers. Finally, Bulgarian mainstream identity significantly predicted well-being of youth from all groups, independent of their ethnic background.<br />
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<B>Conclusions</b><br />
A strong ethnic and familial identity results in beneficial psychological outcomes for youth, even in the face of adversity and assimilation.