Treska (Macedonian: Треска, Albanian: Treskë) is a river in the western part of North Macedonia, a right tributary to Vardar. It is 132 km (82 mi) long, and its basin is 2,350 km.

It rises in the Stogovo mountain at an altitude of around 2,000 meters, and flows eastwards through the valley of Kičevo. At Makedonski Brod it turns northwards, flows between the mountains of Suva Gora and Karadžica, finally flowing into the Vardar in the Skopje suburb Gjorče Petrov.

Three dams have been built on Treska:

• in 1937 the Matka dam and lake near Skopje
• in 2004 the Kozjak dam and lake
• in 2012 the Sveta Petka