Maurice Piat CSSp GCSK (born 19 July 1941) is a Mauritian prelate of the Catholic Church who was Bishop of Port Louis, Mauritius, from 1993 to 2023.

Upon graduating, he entered the novitiate of the Congregation of the Holy Spirit in County Tipperary, Ireland, where he made his solemn profession on 8 September 1962.

He returned to Mauritius and worked as a catechist and professor at his old college until 1982, when he was made responsible for seminarians at the Foyer Mgr Murphy in Vacoas.

[2] He chose as his motto "Pousse vers le large" ("Set out into the deep"), a saying of Christ in Luke's Gospel, when he orders Peter the fisherman to cast his net again after a day of unfruitful work .

When created a cardinal on that date, he was made a Cardinal-Priest and assigned the titular church of Santa Teresa al Corso d'Italia.

[9] On 12 March 2017 the government of Mauritius awarded him its highest honour by making him a Grand Commander of Order of the Star and Key of the Indian Ocean (GCSK).