Join 4 upcoming events being held in Marseillan. Marseillan is a charming and historic town in the south of France, located in the Languedoc-Roussillon region along the Mediterranean coast, known for its picturesque marina, beautiful sandy beaches, and famous oyster farms, as well as its proximity to the Thau Lagoon, a large saltwater lagoon that is home to a variety of wildlife, making it an ideal destination for those seeking a relaxed and authentic French Riviera experience.