Jón Magnússon may refer to:
Jón Magnússon, Earl of Orkney in 1284–c. 1300 Jón Magnússon (author), 17th century Icelandic author Jón Magnússon (politician) (1859-1926), prime minister of Iceland Jón Arnar Magnússon (born 1969), Icelandic decathlete Jón Bjarki Magnússon (born 1984), Icelandic journalist and independent documentary filmmaker Jon Magnusson (producer), producer of I'm Sorry I Haven't A Clue Jón Magnússon (handballer) Jón Magnússon (painter), born 1966