| Guglielmo Trevisan | |
| Fullname: | Guglielmo Trevisan |
| Position: | Midfielder |
| Birth Date: | 31 January 1918 |
| Birth Place: | Trieste, Italy |
| Death Place: | Trieste, Italy |
| Years1: | 1934–1941 |
| Caps1: | 117 |
| Goals1: | 40 |
| Clubs2: | → Ponziana (loan) |
| Years2: | 1935–1937 |
| Caps2: | ? |
| Goals2: | ? |
| Years3: | 1941–1943 |
| Caps3: | 54 |
| Goals3: | 26 |
| Clubs4: | San Giusto Trieste |
| Years4: | 1943–1944 |
| Caps4: | 14 |
| Goals4: | 4 |
| Years5: | 1945–1946 |
| Caps5: | 58 |
| Goals5: | 9 |
| Years6: | 1947–1950 |
| Caps6: | 105 |
| Goals6: | 15 |
| Years7: | 1950–1952 |
| Caps7: | 55 |
| Goals7: | 12 |
| Years8: | 1952–1953 |
| Caps8: | 31 |
| Goals8: | 5 |
| Years9: | 1953–1954 |
| Caps9: | 29 |
| Goals9: | 1 |
| Clubs10: | Ortona |
| Years10: | 1954–1955 |
| Caps10: | ? |
| Goals10: | ? |
| Nationalyears1: | 1940 |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 1 |
| Manageryears1: | 1950–1952 |
| Manageryears2: | 1952–1953 |
| Managerclubs3: | Ortona |
| Manageryears3: | 1954–1955 |
| Manageryears4: | 1959–1961 |
| Manageryears5: | 1961–1962 |
| Manageryears6: | 1962–1963 |
| Manageryears7: | 1963–1965 |
| Manageryears8: | 1969–1970 |
Guglielmo Trevisan (pronounced as /it/; 31 January 1918 - 23 December 2003) was an Italian association football manager and footballer who played as a midfielder. He represented the Italy national football team twice, the first being on 5 May 1940, the occasion of a friendly match against Germany in a 3–2 home win.[1]