The Mat Salleh Rebellion is a series of major armed disturbances against the British North Borneo Chartered Company administration in North Borneo, today the Malaysian state of Sabah.

It is instigated by Datu Muhammad Salleh (also known as Mat Salleh), a local chief from the Lingkabo district and Sugut River.

He leads the rebellion between 1894 until his death in Tambunan in 1900.

The rebellion then continues on for another five years until 1905.

His revolts are widely supported by the local communities and affect a large geographical area from Sandakan, across Gaya Island, including the interior, especially Tambunan.

His most notable uprising occurs at midnight on 9 July 1897, when he leads his followers to successfully attack a major colonial settlement on Gaya Island.