The Arve (French pronunciation: [aʁv]) is a river in France (département of Haute-Savoie), and Switzerland (Canton of Geneva ). A left tributary of the Rhône, it is 108 km (67 mi) long, of which 9 km in Switzerland. Its catchment area is 1,976 km2 (763 sq mi), of which 80 km2 in Switzerland. Its average discharge in Geneva is 79 m3/s (2,800 cu ft/s).

Rising in the northern side of the Mont Blanc massif in the Alps , close to the Swiss border, it receives water from the many glaciers of the Chamonix valley (mainly the Mer de Glace) before flowing north-west into the Rhône on the west side of Geneva, where its much higher level of silt brings forth a striking contrast between the two rivers.

The Arve flows through Chamonix, Sallanches, Oëx, Cluses , Bonneville, Annemasse and Geneva.