| Gianni Toppan | |
| Fullname: | Giovanni Toppan |
| Birth Date: | 8 November 1920 |
| Birth Place: | Sequals, Italy |
| Death Place: | Milan, Italy |
| Height: | 1.74 m |
| Position: | Midfielder |
| Years2: | 1940–1949 |
| Clubs1: | Falck |
| Clubs2: | Milan |
| Caps2: | 141 |
| Goals2: | 1 |
Giovanni "Gianni" Toppan (8 November 1920 – 1 February 1987) was an Italian professional footballer, who played as a midfielder.