| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Female | |
| Full name | Grethe•Mathiesen (-Thor) | |
| Used name | Grethe•Mathiesen | |
| Born | 10 April 1956 in Kirkenes, Sør-Varanger, Finnmark |  NOR |
| Measurements | 171 cm / 58 kg | |
| Affiliations | Kirkenes Svømmeklubb — Kirkenes, Sør-Varanger, Finnmark | NOR |
| NOC | Norway | NOR |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1972 Summer Olympics | Swimming (Aquatics) | NOR |
Grethe Mathiesen | |||
| 100 metres Freestyle, Women (Olympic) | 18 |
