| Guillaume Marchand | |
| Birth Name: | Guillaume Marchand |
| Birth Date: | 1998 6, df=yes |
| Birth Place: | Saint-Gaudens, France |
| Weight: | 102kg (225lb) |
| Ru Currentteam: | Lyon |
| Ru Currentposition: | Hooker |
| Position: | Hooker |
| Amatyears2: | 2013–2018 |
| Amatteam1: | US Montréjeau |
| Amatteam2: | Toulouse |
| Years1: | 2018–2021 |
| Clubs1: | Toulouse |
| Apps1: | 49 |
| Points1: | 10 |
| Years2: | 2021– |
| Clubs2: | Lyon |
| Apps2: | 77 |
| Points2: | 35 |
| Ru Clubupdate: | 12 November 2024 |
| Repyears1: | 2018 |
| Repteam1: | France U20 |
| Repcaps1: | 8 |
| Reppoints1: | 0 |
| Ru Ntupdate: | 17 June 2018 |
Guillaume Marchand (born 5 June 1998) is a French rugby union player. His position is hooker and he currently plays for Lyon in the Top 14.[1]
Marchand is the younger brother of Julien Marchand, who plays with Stade Toulousain as a hooker.