Þorsteinn Þorsteinsson (disambiguation)

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