Þorsteinn Þorsteinsson may refer to:
- Þorsteinn Þorsteinsson (1880–1979), Icelandic economist and Esperantist
- Þorsteinn Þorsteinsson (athlete) (born 1947), Icelandic athlete who competed in the 800 metres
- Þorsteinn Þorsteinsson (footballer) (born 1964), Icelandic footballer
This disambiguation page lists articles about people with the same name.
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