Guðjón [ˈkvʏðˌjouːn] 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