| Renzo Fontona | |
| Fullname: | Renzo Fontona |
| Birth Date: | 1939 7, df=yes |
| Birth Place: | Riccò del Golfo di Spezia, Italy |
| Discipline: | Road |
| Role: | Rider |
| Proyears1: | 1961–1962 |
| Proteam1: | Legnano |
| Proyears2: | 1963 |
| Proteam2: | IBAC |
| Proyears3: | 1964–1965 |
| Proteam3: | Ignis |
| Proyears4: | 1966–1967 |
| Proteam4: | Mainetti |
| Proyears5: | 1968 |
| Proteam5: | Kelvinator |
Renzo Fontona (born 2 July 1939) is an Italian racing cyclist. He ended up 7th at the 1963 Tour de France.