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.

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.

[3] The town grew up around a Benedictine monastery founded in 671 by Amandus and the church of St Peter where the body of Charles the Bald was initially buried.

[4] In 1944, a hundred men were arrested and deported and the local French Secret Army leader was shot dead by the Nazis in response to French resistance activities.

[5] Nantua faces the small Lac de Nantua on its west side and is protected by high cliffs on its landward sides which gives rise to a relatively mild continental climate.