During recent decades, ethnic and racial variability has increased greatly in classic immigration countries such as Australia, Aotearoa-New Zealand, Canada, and the United States. In Western Europe as well, immigration from North Africa, Asia, and neighboring European countries has accompanied the economic rise and decrease in birthrates characterizing that part of the world. In all these countries, minority and immigrant groups may include a disproportionate percentage of young people who need to find a place in society while developing complex and evolving forms of identity. This chapter introduces a variety of culturally informed models of identity development that may be useful to social workers, clinical and counseling psychologists, and educators. They may be in a position to support adolescents from a broad range of ethnic, religious, and bicultural groups as well as youth differing in their sexual orientation and gender identity.