| Strokes: | Long-distance swimming |
| Birth Date: | 15 May 1972 |
| Birth Place: | Varese, Italy |
| National Team: | Italy |
| Show-Medals: | yes |
Viola Valli (born 15 May 1972) is a former female open water swimmer from Italy. She is the former world champion at the 5 km, 10 km and 25 km open water distance.[1]
She won 12 medals (8 individual) at the World Open Water Swimming Championships.[1]
| Championship | Edition | 5 km | 10 km | 25 km | Team 5 km | Team 10 km | Team 25 km |
|---|---|---|---|---|---|---|---|
| World Championships |  2000 Honolulu | ||||||
 2001 Fukuoka | |||||||
 2002 Sharm el Sheikh | |||||||
 2003 Barcelona | |||||||
| European Championships |  1999 Istanbul | ||||||
| 2002 Berlin |