The Aan River is a short river in the South Island of New Zealand.

The river flows out of Lake Innes and into the sea on the southern coast of the South Island.

[1][2] The river may be reached on foot via the South Coast Track, which crosses it via a suspension bridge.

[3] It also has a tributary that drains the basin to the south of the 1189-metre high Mount Aitkin.

This article about a river in Fiordland is a stub.