Culoz (French pronunciation: [kyloz] or [kylo]) is a former commune in the Ain department in the Auvergne-Rhône-Alpes region of France. On 1 January 2023, it was merged into the new commune of Culoz-Béon.

The town, which is situated on the right bank of the River Rhône just a few kilometres from the first foothills of the Alps, is dominated by the Grand Colombier: the highest summit of the southern end of the Jura mountain range.

Culoz lies on the D904 road close to the point at which it crosses the D992 and is also an important railway junction: Culoz railway station is served by lines to Geneva, Bellegarde-sur-Valserine, Évian-les-Bains, Aix-les-Bains, Bourg-Saint-Maurice, Lyon, and Paris.

• Henry Dunant, Nobel Peace Prize winner, 1901, was one of the founders of the Red Cross
• The surgeon Antonin Poncet, who died in Culoz in 1951
• Brothers Henry and Léon Serpollet, steam engineers
• Christophe Lemaitre, sprinter, European champion.

Historical population

Year	Pop.	±% p.a.
1968	2,412	—
1975	2,523	+0.64%
1982	2,630	+0.60%
1990	2,639	+0.04%
1999	2,622	−0.07%
2007	2,957	+1.51%
2012	2,940	−0.12%
2017	3,035	+0.64%
Source: INSEE

• Communes of the Ain department

• (in French) The history of Culoz (plain text)
• (in French) Official Culoz website
• (in French) Tourism Office Archived 2008-09-29 at the Wayback Machine
• (in French) Gazetteer Entry