This article provides an overview of the main demographic, social, and economic characteristics of Portuguese immigration in Switzerland. Firstly, it outlines the political and economic underpinnings of Portuguese migration flows to Switzerland. Then, it analyzes the demographic and sociological composition of these flows, the composition of the Portuguese population in Switzerland, as well as processes of economic and cultural integration. It is notably argued that the enduring Portuguese “ideology of return migration” has played a central role in the patterns of integration of Portuguese immigrants in Switzerland.