Olaf Guthfrithsson (died 941), a member of the Norse-Gael Uí Ímair dynasty, is King of Dublin from 934 to 941.

He succeeds his father, Gofraid ua Ímair, who was also briefly king of York in 927 following the death of his kinsman Sitric Cáech, but was expelled in the same year by king Æthelstan of England.