Guðjón is an Icelandic given name.
Guðjón S. Brjánsson (born 1955), Icelandic MP Guðjón Arnar Kristjánsson (born 1944), Icelandic MP and chairman of the Liberal Party Guðjón Samúelsson (1887–1950), State Architect of Iceland Guðjón Valur Sigurðsson (born 1979), Icelandic handball player Guðjón Þórðarson (born 1955), Icelandic former footballer and manager