Cosne-Cours-sur-Loire (French pronunciation: [kon kuʁ syʁ lwaʁ] ) is a commune and a subprefecture of the Nièvre department in central France. It was created in 1973 by the merger of two former communes: Cosne-sur-Loire and Cours.

Cosne-Cours-sur-Loire lies on the right bank of the Loire at its confluence with the Nohain, about 50 km northwest of Nevers. Cosne-sur-Loire station has rail connections to Nevers, Montargis and Paris. The A77 autoroute (Montargis–Nevers) passes east of the town.

Cosne is mentioned in the 3rd-century Antonine Itinerary under the name of Condate, but it was not until the Middle Ages that it rose into importance as a military post. In the 12th century the bishop of Auxerre and the Count of Nevers agreed to a division of the supremacy over the town and its territory.

Historical population

Year	Pop.	±% p.a.
1968	10,588	—
1975	12,088	+1.91%
1982	12,463	+0.44%
1990	12,123	−0.35%
1999	11,399	−0.68%
2009	10,741	−0.59%
2014	10,553	−0.35%
2020	9,415	−1.88%
Source: INSEE

The church of St Aignan is a building of the 12th century, restored in the 16th and 18th centuries. The only portions in the Romanesque style are the apse and the north-west portal. It formerly belonged to a Benedictine priory depending on the abbey of La Charité.

• Roger Marie Bricoux, cellist on the RMS Titanic

Cosne-Cours-sur-Loire is twinned with:

Bad Ems, Germany Harpenden, United Kingdom Herentals, Belgium

• Communes of the Nièvre department

• Official website Archived 19 August 2009 at the Wayback Machine (in French)
• Tourism Office

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