Mordalup is a rural locality of the Shire of Manjimup in the South West region of Western Australia.

The locality's southern border is formed by the Muir Highway.

Mordalup also borders the northern shore of Lake Muir.

[2][3] Mordalup is located on the traditional land of the Bibulman people of the Noongar nation.

[4][5][6] In October 1910, a state school was opened in Mordalup,[7] consisting of a small slab hut.