Charly-sur-Marne (French pronunciation: [ʃaʁli syʁ maʁn], literally Charly on Marne) is a commune in the Aisne department in Hauts-de-France in northern France.

Charly was an old fortified city dating from 9th century Burgundy, it was renamed Charly-sur-Marne in 2006.

In 858 Charles the Bald, granted rights to establish the female abbey of Notre-Dame de Soissons, which included extensive seigniory lands in Charly, which dedicated lands lasted until the French Revolution.

Louis Emile Morlot (*1859, 1907), was the mayor of Charly, a French Deputy, and the leader in the legal battle to keep the name Champagne restricted to the sparking wine produced from the vineyards located between Crouttes-sur-Marne and Trélou.

In the First World War, the German First Army under von Kluck had occupied Charly, when in the First Battle of the Marne, the British Expeditionary Force (BEF) counter-attack crossed the Marne at Charly.