Reuilly-Sauvigny () is a commune in the Aisne department in Hauts-de-France in northern France.
The village is located in Condé-en-Brie, in the south of the Aisne department, bordering on the Marne department. About 10 kilometres to the east of the commune is Château-Thierry, which is located on a hillside in Marne.
Two surrounding fords meant it was easiest to cross la Marne at the top of the commune, making it a strategic point during the two World wars, during which Reuilly was very heavily damaged.
The Reuilly-Sauvigny coat of arms is emblazoned with: Green with a golden sword, three lioncubs stitched on a silver waving fabric