Population density of the French overseas regions 1967-2020, by region
In 2020, there was an average of 344.7 inhabitants per square kilometer on the island of La Réunion, a French overseas region. It was in fact the most densely populated of the overseas regions, followed by Martinique and Guadeloupe. In contrast, there were only 3.4 inhabitants per square kilometer in French Guiana.
In the same year, La Réunion, Martinique and Guadeloupe were the three most densely populated French regions after Île-de-France (1,021.6 inhabitants per square kilometer), while Guyane was at the bottom of the ranking.