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