Together with the border between the US and Mexico, the Mediterranean is the largest migration area in the world. The stock of migrants resident in the Mediterranean countries was 42.6 million in 2020. About 2/3 of these international migrants are found in 4 countries (France, Spain, Italy, Turkey) and 20% in the rest of the Near East (Jordan, Lebanon, Israel, Syria, Palestine). The absolute number of these international migrants can vary greatly from one country to another; the migrants can thus represent a significant share of the overall population. The Mediterranean Basin has been historically characterised by a regular circulation of people within the region. The period after World War II till today (1948–2022) has been characterised by several changes in the Mediterranean migration system, which were largely driven by economic and political factors. Through a chronological approach, we can identify five periods that synthetise the evolution of migration in the Mediterranean region during this period.