| Janez Demšar | |
| Nationality: | Slovenian |
| Sport: | Ski jumping |
| Birth Date: | 25 February 1951 |
| Birth Place: | Jesenice, Yugoslavia |
Janez Demšar (born 25 February 1951) is a Slovenian ski jumper. He competed in the normal hill and large hill events at the 1976 Winter Olympics.[1]