Michael Joseph McGrath (24 March 1882 – 28 February 1961) was an Irish-born prelate of the Roman Catholic Church.
He achieved a BA from the Royal University of Ireland in Irish language in 1915, and an MA from its successor the NUI in 1918.
He initially worked as a priest for the Catholic diocese of Clifton, followed by Bristol's Church of St. Nicholas.
McGrath went on to serve at Flint, Bangor and, in 1928, Aberystywth as parish priest, where he befriended Thomas Gwynn Jones.
His consecration to the Episcopate took place on 24 September 1935, the principal consecrator was Archbishop Francis Mostyn of Cardiff, and the principal co-consecrators were Bishop William Lee of Clifton and Bishop Ambrose James Moriarty of Shrewsbury.