Korzhin Island (also known as Kurzhin, Kurdzhyn, Korzhun, Kurzhon or Kurdzhun Island) is a long and flat island in Lake Balkhash. It is located in the central portion of the lake.
Korzhin Island has a length of 13.5 km (8.4 mi) and a maximum width of 0.8 km (0.50 mi).
Administratively Korzhin Island belongs to the Almaty Province of Kazakhstan.