Lake Volvi (Greek: Λίμνη Βόλβη, modern: Limni Vólvi) is located in the root of the Chalkidiki peninsula, in the Thessaloniki regional unit, Greece. Lake Volvi is the second largest lake in Greece. It is about 12 miles (19 km) in length, and 6 or 8 miles (9.7 or 12.9 km) wide. The area is 68 km² and the depth is 20 m.