Arrondissement of Nantua

Nantua (French pronunciation: [nɑ̃tɥa] ; Arpitan: Nantuat) is a commune in and subprefecture of the Ain département in the Auvergne-Rhône-Alpes region in Eastern France. The commune of Nantua comprises the glacial Lac de Nantua. Located in the Haut-Bugey historical region, among the southern foothills of the Jura Mountains, it is famous for its fresh-water fish and crayfish.

The canton of Nantua is an administrative division in eastern France. At the French canton reorganisation which came into effect in March 2015, the canton was expanded from 12 to 18 communes (2 of which merged into the new commune Le Poizat-Lalleyriat):

The Lac de Nantua (Lake of Nantua) is a glacial lake in the southern foothills of the Jura Mountains in the Haut-Bugey historical region, located between Nantua, Montréal-la-Cluse and Port in the department of Ain, France. It covers 141 hectares (0.54 sq mi). The lake was made a protected natural site in 1935.

Chevillard is a commune in the Ain department in eastern France.

Port (French pronunciation: [pɔʁ] ) is a commune in the Ain department in eastern France.

Saint-Martin-du-Frêne (French pronunciation: [sɛ̃ maʁtɛ̃ dy fʁɛn] ) is a commune in the Ain department in eastern France.

Maillat (French pronunciation: [maja] ) is a commune in the Ain department in eastern France.

Brion—Montréal-la-Cluse station (French: Gare de Brion—Montréal-la-Cluse) is a French railway station located in commune of Brion, Ain department in the Auvergne-Rhône-Alpes region. The station is also within close proximity of the commune of Montréal-la-Cluse, for which it is jointly named after. It is located at kilometric point (KP) 35.618 on the Ligne du Haut-Bugey (Bourg-en-Bresse–Bellegarde railway). Opened in 1996 by the SNCF, the station replaced the now closed La Cluse station. Its layout was further modified during the closure of the Haut-Bugey railway between 2005 and 2010. As of 2022, the station is owned and operated by the SNCF and served by TER Auvergne-Rhône-Alpes trains.

Condamine (French pronunciation: [kɔ̃damin] ) is a commune in the Ain department in eastern France.

Montréal-la-Cluse (French pronunciation: [mɔ̃ʁe.al la klyz] ) is a commune in the Ain department in eastern France. It is located in the historical region of Bugey and its inhabitants are known as the Montréalais.

Brion (French pronunciation: [bʁijɔ̃] ) is a commune in the Ain department in eastern France. The name comes from the Latin word Bria meaning fortress, and it is home to a ruined castle. Brion—Montréal-la-Cluse station has rail connections to Bourg-en-Bresse and Oyonnax.

The Ange, less often called the Lange, is a river in the Ain department, eastern France. It is a 20.7-kilometre (12.9 mi) left tributary of the Oignin. It flows into the Rhône by the river Ain.