| Þorgils Mathiesen | |
| Fullname: | Þorgils Óttar Mathiesen |
| Nationality: | Icelandic |
| Birth Date: | 16 May 1956 |
| Height: | 188 cm |
| Currentclub: | Retired |
| Nationalteam1: | Iceland |
| Nationalcaps1: | 247 |
| Nationalgoals1: | 575 |
Þorgils Óttar Mathiesen (born 17 May 1962) is an Icelandic former handball player who competed in the 1984 Summer Olympics and in the 1988 Summer Olympics.[1]