The Impey River is a river in the Mid West region of Western Australia; It rises south of Mount Murchison and flows east-north-east until it merges with the Murchison River, of which it is a tributary.

The first recorded sighting of the river was by surveyor Robert Austin during an expedition in 1857.

In 1858 the river was named by explorer Francis Gregory[3] after the prominent geologist, Sir Roderick Impey Murchison.

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