Rossport (Irish: Ros Dumhach; also known as Rosdoagh) is a Gaeltacht village and townland in northwest County Mayo, Ireland.

About the year 1707, Thomas Bournes, a Cromwellian from County Sligo was granted Rossport and neighbouring Muingnabo from Arthur Shaen.

Another George Bournes, probably a great grandson of the original man referred to previously, is reported to have written to the Protestant Bishop of Killala requesting relief for the starving tenants.

Samuel Bournes inherited Rossport from his father George and in 1832 he cleared tenant farmers off the southern end of the townland to build a substantial and commodious two-storey house with suitable offices and walled garden.

The Bournes estate provided some of its tenants with other employment in the form of an industrial school which taught knitting and sewing.

In 1959 it was made into a Gael Linn college, the predecessor of the current (secondary school) Colaiste Chomain in the middle of the village to which it moved in 1968.

Around the turn of the 20th century, the government contemplated the erection of a bridge across Sruth Fada Conn Bay from Rossport to Glengad.

In 1900 the secretary of the Congested Districts Board wrote: "The possible sites for a bridge are two:- These are rough estimates and include the cost of approaches" Nothing much happened and in 1914 Fr.

Rossport came to national prominence in 2005 when five local men were jailed for refusing to allow Royal Dutch Shell access to their lands.

The An Bord Pleanala Oral hearing held in the summer of 2009 in the Broadhaven Bay Hotel in Belmullet was attended daily by many Rossport residents has declared this route unacceptable on safety grounds.

Shell drew up proposals to bring the pipeline up Sruth Fada Conn Bay which they presented to An Bord Pleanala in May 2010.