| Personal information | |||
|---|---|---|---|
| Full name | William Viali | ||
| Date of birth | 16 November 1974 | ||
| Place of birth | Vaprio d'Adda, Italy | ||
| Height | 1.85 m (6 ft 1 in) | ||
| Position(s) | Defender | ||
| Team information | |||
Current team | Reggiana (head coach) | ||
| Youth career | |||
| 1991–1993 | Atalanta | ||
| Senior career* | |||
| Years | Team | Apps | (Gls) |
| 1993–1994 | Fiorenzuola | 29 | (1) |
| 1994–1995 | Ravenna | 26 | (1) |
| 1995 | Cesena | 3 | (0) |
| 1995–1996 | Monza | 13 | (0) |
| 1996–1997 | Ascoli | 28 | (2) |
| 1997–2001 | Lecce | 111 | (4) |
| 2001–2002 | Venezia | 15 | (0) |
| 2002–2003 | Palermo | 0 | (0) |
| 2002–2003 | → Perugia (loan) | 11 | (0) |
| 2003 | → Ancona (loan) | 13 | (1) |
| 2004–2006 | Fiorentina | 53 | (1) |
| 2005–2006 | → Treviso (loan) | 26 | (0) |
| 2006–2007 | Treviso | 56 | (3) |
| 2008–2010 | Cremonese | 71 | (5) |
| Managerial career | |||
| 2010–2011 | Fiorenzuola | ||
| 2012 | Parma U16 | ||
| 2012–2013 | Lupa Piacenza | ||
| 2013 | Piacenza | ||
| 2014 | Piacenza | ||
| 2015–2016 | Pro Piacenza | ||
| 2016–2017 | Südtirol | ||
| 2017–2018 | Cuneo | ||
| 2018–2019 | Novara | ||
| 2019 | Novara | ||
| 2020–2022 | Cesena | ||
| 2022–2023 | Cosenza | ||
| 2023 | Ascoli | ||
| 2024 | Cosenza | ||
| 2024– | Reggiana | ||
| *Club domestic league appearances and goals | |||
William Viali (born 16 November 1974) is an Italian football manager and a former player who played as a defender. He is the head coach of Serie B club Reggiana.