The neighboring municipalities of La Chapelle-des-Marais are Herbignac, Saint-Joachim, Sainte-Reine-de-Bretagne and Missillac.

[3] 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.

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.

The city has one association football team, FC La Chapelle-des-Marais, playing in Group H of the Championnat de France amateur 2, the 5th division of the French football league system.

They were founded in 1989[7] and play at the Stade Municipal de la Perriere.