John Peter McGrath (1 June 1935 – 22 January 2002) was a British playwright and theatre theorist who took up the cause of Socialism in his plays.

(7 March 1903 – 23 December 1977) an Australian-born architect, illustrator, printmaker and interior designer who for the greater part of his career was Principal Architect for the Office of Public Works in Ireland.

William Worthington McGrath (11 December 1916 – 12 December 1991) was a loyalist from Northern Ireland who founded the far-right organisation Tara in the 1960s, having also been prominent in the Orange Order until his expulsion due to his paedophilia.

an Irish actress known for several television series: portraying Morgana Pendragon in BBC One's Merlin, Lucy Westenra on the British-American series Dracula, Saskia in the TV series Secret Bridesmaids Business, Sarah Bennett in the first season of the horror anthology series Slasher, and for her role as Lena Luthor on the superhero series Supergirl.

Mark Sayers McGrath (born March 15, 1968) is an American singer who is the lead vocalist of the rock band Sugar Ray.

Glenn Donald McGrath (born 9 February 1970) is an Australian former international cricketer whose career spanned 14 years.

Patrick (born 17 March 1956) a British comedian, television personality, and writer.

Alister Edgar McGrath (born 1953) is a Northern Irish theologian, Anglican priest,What is an Evangelical Anglican?

Amy Melinda McGrath (born June 3, 1975) is an American former Marine fighter pilot and former political candidate from Kentucky.

Tahlia May McGrath (born 10 November 1995) is an Australian cricketer.

Robert Emmett McGrath (June 13, 1932 – December 4, 2022) was an American actor, singer, and children's author best known for playing original human character and music teacher Bob Johnson on the educational television series Sesame Street from 1969 to 2016.

(@TitaniaMcGrath) a parody Twitter account created and run by Andrew Doyle, an Irish comedian and Spiked columnist.

(born June 4, 1951) a Canadian actor and writer.