| Guillermo Bongiorno | |
| Fullname: | Guillermo Rubén Bongiorno |
| Birth Place: | Mar del Plata, Argentina |
| Currentteam: | Retired |
| Discipline: | Road |
| Role: | Rider |
| Ridertype: | Sprinter |
| Amateuryears1: | 2001–2002 |
| Amateurteam1: | Parolin–Uniconfort |
| Amateuryears2: | 2013–2014 |
| Amateurteam2: | Sprint Haupt |
| Amateuryears3: | 2014–2016 |
| Amateurteam3: | Buenos Aires Ciudad |
| Amateuryears4: | 2017 |
| Amateurteam4: | Expo Ladrillos–Luján |
| Proyears1: | 2003–2009 |
| Proyears2: | 2010 |
| Proyears3: | 2011 |
Guillermo Rubén Bongiorno (born 29 July 1978 in Mar del Plata) is an Argentine former professional cyclist.[1]