| Harri Nyyssönen | |
| Fullname: | Harri Nyyssönen |
| Birth Date: | 15 November 1965 |
| Birth Place: | Mikkeli, Finland |
| Position: | Midfielder |
| Years1: | 1984–1991 |
| Clubs1: | KuPS |
| Caps1: | 142 |
| Goals1: | 9 |
| Years2: | 1992–1995 |
| Clubs2: | Haka |
| Caps2: | 50 |
| Goals2: | 1 |
| Years3: | 1995 |
| Clubs3: | Lahti |
| Caps3: | 7 |
| Goals3: | 0 |
| Years4: | 1996 |
| Clubs4: | Hämeenlinna |
| Caps4: | 15 |
| Goals4: | 4 |
| Years5: | 1998–1999 |
| Clubs5: | KuPS |
| Caps5: | 24 |
| Goals5: | 0 |
| Totalcaps: | 238 |
| Totalgoals: | 14 |
| Nationalyears1: | 1991–1992 |
| Nationalteam1: | Finland |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 0 |
Harri Nyyssönen (born 15 November 1965) is a Finnish former footballer who played at both professional and international levels as a midfielder. His brother is fellow player Kai Nyyssönen.
Born in Mikkeli, Nyyssönen played club football for KuPS, Haka, Lahti and Hämeenlinna.
He also earned five caps for Finland between 1991 and 1992.