This topical book sheds light on immigrants' subjective well-being by analysing the main factors associated with self-reported life satisfaction among immigrants and natives. It thereby draws upon subjective components of well-being, which are now receiving growing attention in well-being research. It also fills in a gap in migration research, which has not yet focused on the study of immigrants' well-being. Starting from a broader focus on Europe, the book then looks more closely at Italy. This is a key country in the immigration policy field in Europe, but where the study of immigrants' integration from a subjective perspective has been rarely addressed so far. The book provides suggestions for constructing and implementing immigration and integration policies by not only taking into account the needs of the host societies, but also the experiences, opinions, requirements and expectations of immigrants. This book is very useful for academic and policy researchers working on immigrant integration issues.