
Aunis is a historical province of France, situated in the north-west of the department of Charente-Maritime. Its historic capital is La Rochelle, which took over from Castrum Allionis (Châtelaillon) the historic capital which gives its name to the province.

Aigrefeuille-d'Aunis is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region of south-western France.

Arçais is a commune in the Deux-Sèvres department in the Nouvelle-Aquitaine region in western France. It is the only village which is located in the centre of the Marais Mouillé, the so-called "wet marsh" which forms the eastern half of the Marais Poitevin, near the city of Niort. It is a popular centre for tourism, with several embarcadères which hire out punts and other boats for use on the network of canals that surrounds the village. There are also several shops, bars and other facilities, including bike hire.

Châtelaillon-Plage is a commune in the Charente-Maritime department in southwestern France.
Fouras, also known as Fouras-les-Bains, is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France. It lies 34 km south of La Rochelle.

Île de Ré is an island off the west coast of France near La Rochelle, on the northern side of the Pertuis d'Antioche strait. Its highest point has an elevation of 20 metres. It is 30 kilometres long and five kilometres wide. The 2.9 km (1.8 mi) Île de Ré bridge, completed in 1988, connects it to La Rochelle on the mainland.
L'Île-d'Elle is a commune in the Vendée department in the Pays de la Loire region in western France.

Marans is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.
Mauzé-sur-le-Mignon is a commune in the Deux-Sèvres department in western France, the birthplace of René Caillié.

Île d'Oléron is an island off the Atlantic coast of France, on the southern side of the Pertuis d'Antioche strait.
Rochefort, also known as Rochefort-sur-Mer, is a commune in southwestern France, a port on the Charente estuary. It is a sub-prefecture of the Charente-Maritime department.

La Rochelle is a city in southwestern France and a seaport on the Bay of Biscay, a part of the Atlantic Ocean. It is the capital of the Charente-Maritime department. With 75,735 inhabitants in 2017, La Rochelle is the most populated commune in the department and ranks fifth in the New Aquitaine region after Bordeaux, the regional capital, Limoges, Poitiers and Pau. Its inhabitants are called "les Rochelaises" and "les Rochelais".

The Abbey of Saint-Léonard des Chaumes was a Cistercian monastery in Dompierre-sur-Mer in the province of Aunis in the Kingdom of France. It was destroyed in the 18th century.

Saint-Hilaire-la-Palud is a commune in the Deux-Sèvres department in western France.
Saint-Jean-de-Liversay is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.

Saint-Martin-de-Ré is a commune in the western French department of Charente-Maritime.

Saint-Pierre-d'Oléron is a commune in the Charente-Maritime department in southwestern France. It is located on the island of Oléron. As the largest city on the island, it is widely considered to be the island's main city.
Saint-Sauveur-d'Aunis is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.

Surgères is a commune in the Charente-Maritime department in southwestern France. It is the home of the Surgères 48 Hour Race.