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

The South Western Highway forms the entirety of the eastern border of the locality.

[2][3] Shannon is on the traditional land of the Mineng people of the Noongar nation.

[4][5][6] The river's and locality's name is reported to have been taken from HMS Shannon, a frigate of the Royal Navy, best known for its victory over USS Chesapeake in 1813.

The names Shannon and Broke for geographical features in the area were first recorded on a map by John Arrowsmith in 1833.