| Gianpietro Marchetti | |
| Birth Date: | 22 October 1948 |
| Birth Place: | Rudiano, Italy |
| Position: | Defender |
| Years1: | 1966–1968 |
| Years2: | 1968–1969 |
| Years3: | 1969–1974 |
| Years4: | 1974–1979 |
| Years5: | 1979–1980 |
| Clubs4: | Atalanta |
| Clubs5: | Catanzaro |
| Caps1: | 6 |
| Goals1: | 0 |
| Caps2: | 37 |
| Goals2: | 3 |
| Caps3: | 102 |
| Goals3: | 6 |
| Caps4: | 124 |
| Goals4: | 1 |
| Caps5: | 10 |
| Goals5: | 0 |
| Nationalyears1: | 1972–1973 |
| Nationalteam1: | Italy |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 0 |
Gianpietro Marchetti (pronounced as /it/; born 22 October 1948) is a retired Italian professional footballer who played as a defender.