| Willie Sinclair | |
| Fullname: | William Mearns Sinclair |
| Birth Date: | 14 October 1934 |
| Birth Place: | Coatbridge, Scotland |
| Position: | Right winger |
| Years1: | 1950–1953 |
| Years2: | 1953–1959 |
| Years3: | 1959–1960 |
| Years4: | 1960 |
| Years5: | 1961 |
| Years6: | 1961–1962 |
| Clubs6: | Stirling Albion |
| Caps1: | 0 |
| Goals1: | 0 |
| Caps2: | 88 |
| Goals2: | 21 |
| Caps3: | 15 |
| Goals3: | 5 |
| Caps4: | 4 |
| Goals4: | 0 |
| Caps5: | 21 |
| Goals5: | 3 |
| Caps6: | 18 |
| Goals6: | 3 |
William Mearns Sinclair (born 14 October 1934) is a Scottish former professional footballer who played as a midfielder for Aberdeen, Falkirk, Huddersfield Town, Tranmere Rovers, Halifax Town and Stirling Albion.
In the early 1960s Sinclair moved to Australia where he played for Adelaide Polonia and APIA.[1]