Our purpose in undertaking this research is to methodically map the labour market circumstances of the main immigrant groups in Greece. We classify all of the Districts of Greece into three categories (Diverse, Mixed and Unmixed) according to the ethnic composition of each District. We measure how the employment status of the immigrants varies (1) according to the ethnic group and sex of the immigrant, and (2) according to the ethnic composition and economic structure of a District. In general, the majority of immigrants exhibit lower unemployment and higher economic activity rates than the indigenous Greeks. Three immigrant groups (Albanians, Bulgarians and “Other”), which make up two-thirds of the foreign-born population of Greece, have lower unemployment rates than the national average, and lower rates than Greeks as well. The poorest labour market outcomes are observed in Unmixed and Mixed Districts, whereas Diverse Districts are better off. At the regional level, the most disadvantaged Geographical Department is the Ionian Islands, since it presents the highest unemployment rates for the general population for both sexes. With regard to sex-differential unemployment across immigrant groups, we found that women exhibit higher unemployment than men in almost every ethnic group.