The territory of La Chapelle-des-Marais commune has two distinct parts: the "mainland" where the village developed and which is home to some "small villages" and the marsh surrounding the Mayun peninsula and the twin islands of Camer-Camerun.
In 1846, the region had 1,900 inhabitants. Two-thirds of them worked and lived in the two large villages of Mayun and Camer-Camerun. With 330 inhabitants, the Bourg only gathered 17% of the total population. It contained the church, the school, and the few services and businesses necessary for the economic and social life of a territory whose main activities were related to agriculture.[4]
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