Among the OECD, Germany has become one of the main migrant-receiving nations. According to statistical data, 20.8 million of Germany’s population of 82 million are statistically recognised as migrants. Statistically the migrant population is divided almost equally between foreigners (Ausländer, 9.9 million), who do not hold German citizenship and those with a so-called migration background (Migrationshintergrund, 10.9 million) (Statistisches Bundesamt 2019). Among the group of foreigners, about half are citizens of another EU country (EU-28). Still, the Turkish constitute the largest nationality among the group of foreigners (1.5 million) (Statistisches Bundesamt 2019). Migration to Germany has a relatively long history. Migrants in Germany are thus a diverse group, reflecting different phases of migration since the post-war period. This publication provides an overview of the main phases and groups.