Dónall Peadar Mac Amhlaigh (10 December 1926 – 27 January 1989) was an Irish writer active during the 20th century.
A native of County Galway, he is best known for his Irish-language works about life as a labourer in the post-Second World War-era, as part of the Irish diaspora in Britain.
His first book, Dialann Deoraí, is his most widely known and has been translated into English under the title "An Irish Navvy: The Diary of an Exile".
It was an immediate best-seller and was published in an English translation by the poet Valentin Iremonger (An Irish Navvy: The Diary of an Exile, 1964).
Another book, the novel Deoraithe (1986), covered similar ground, with a hero who tries to make a living in the Ireland of the 1950s and on the building sites of England.