| Guillermo Vallori | |
| Fullname: | Guillermo Juan Vallori Grimalt |
| Birth Date: | 24 June 1982 |
| Birth Place: | Palma de Mallorca, Spain |
| Position: | Centre back |
| Currentclub: | Atlético Baleares |
| Clubnumber: | 4 |
| Youthclubs1: | Mallorca |
| Youthclubs2: | → San Fernando (loan) |
| Youthclubs3: | → Ferriolense (loan) |
| Years1: | 2000–2002 |
| Clubs1: | Santa Ponsa |
| Caps1: | ? |
| Goals1: | 7 |
| Years2: | 2002–2004 |
| Caps2: | 1 |
| Goals2: | 0 |
| Years3: | 2003–2004 |
| Clubs3: | → Santa Ponsa (loan) |
| Caps3: | 36 |
| Goals3: | 7 |
| Years4: | 2004–2007 |
| Caps4: | 112 |
| Goals4: | 20 |
| Years5: | 2007–2012 |
| Caps5: | 141 |
| Goals5: | 6 |
| Years6: | 2012–2016 |
| Caps6: | 93 |
| Goals6: | 7 |
| Years7: | 2016– |
| Caps7: | 98 |
| Goals7: | 3 |
| Club-Update: | 8 September 2019 |
Guillermo Juan Vallori Grimalt (born 24 June 1982[1] in Palma de Mallorca)[2] is a Spanish professional footballer who plays for CD Atlético Baleares as a central defender.[3]