Geoff or Geoffrey Thomas may refer to:

• Geoffrey Thomas (academic) (born 1941), president of Kellogg College, Oxford
• Geoffrey Thomas (businessman) (born 1959), Australian businessman
• Geoff Thomas (footballer, born 1948) (1948–2013), Welsh football player (Swansea City)
• Geoff Thomas (footballer, born 1964), English international football player (Crystal Palace)
• Geoff Thomas (pastor) (born 1938), Welsh pastor
• Geoff Thomas (tennis), Australian tennis player

• Jeffrey Thomas (disambiguation)
• All pages with titles containing Geoffrey Thomas