This special issue brings together nine articles on the experiences of multiracial and multiethnic individuals from nine different countries across the globe – the United Kingdom, Sweden, Ireland, Spain, Canada, the United States, Japan, Singapore and Israel. The articles in this volume address the diverse experiences of the identification, socialising and mainstreaming of multiethnic and multiracial individuals in different national contexts. The collection consists of both qualitative and quantitative research from various disciplines in the social sciences and thus contributes to an interdisciplinary understanding and a multi-method approach to this reality. Through a cross-country analysis of the results provided by each paper, this Introduction proposes a conceptual framework for better understanding the realities of mixedness globally.