Þorsteinn Sæmundsson
Þorsteinn Sæmundsson (German transcription Thorsteinn Saemundsson ) is the name of the following people:
- Þorsteinn Sæmundsson (astronomer) (* 1935), Icelandic astronomer
- Þorsteinn Sæmundsson (politician) (* 1953), Icelandic politician (Progress Party)