| William Pianu | |
| Birth Date: | 7 December 1975 |
| Years1: | 1993–1996 |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 1995–1996 |
| Clubs2: | → Pro Vercelli (loan) |
| Caps2: | 28 |
| Goals2: | 0 |
| Years3: | 1996–1997 |
| Caps3: | 20 |
| Goals3: | 3 |
| Years4: | 1997–1998 |
| Clubs4: | Casarano |
| Caps4: | 13 |
| Goals4: | 0 |
| Years5: | 1998–1999 |
| Caps5: | 18 |
| Goals5: | 0 |
| Years6: | 1999–2004 |
| Caps6: | 78 |
| Goals6: | 3 |
| Years7: | 2004–2005 |
| Caps7: | 47 |
| Goals7: | 1 |
| Years8: | 2006–2007 |
| Caps8: | 47 |
| Goals8: | 2 |
| Years9: | 2007–2009 |
| Caps9: | 45 |
| Goals9: | 0 |
| Years10: | 2009–2010 |
| Caps10: | 4 |
| Goals10: | 0 |
| Years11: | 2010 |
| Caps11: | 12 |
| Goals11: | 1[1] |
| Years12: | 2010–2011 |
| Caps12: | 16 |
| Goals12: | 0 |
| Manageryears1: | 2012–2013 |
| Managerclubs1: | Treviso (assistant) |
| Manageryears2: | 2013 |
| Managerclubs2: | Treviso (youth) |
| Manageryears3: | 2017–2019 |
| Managerclubs3: | Calvi Noale |
William Pianu (born 7 December 1975) is an Italian football coach and a former defender.
Pianu started his career at Juventus. He spent 7 seasons at Treviso.
After the bankrupt of Treviso, he was signed by Gallipoli along with team-mate Alessandro Moro in August 2009.[2] He left in summer 2010 his club U.S. Pergocrema 1932 to sign for Venezia.