| Billy Cowan | |
| Fullname: | William Duncan Cowan |
| Height: | [1] |
| Birth Date: | 9 August 1896 |
| Birth Place: | Edinburgh, Scotland |
| Position: | Inside right |
| Youthclubs1: | Tranent |
| Years1: | 1920–1923 |
| Clubs1: | Dundee |
| Caps1: | 68 |
| Goals1: | 12 |
| Years2: | 1923–1925 |
| Clubs2: | Newcastle United |
| Caps2: | 87 |
| Goals2: | 23 |
| Years3: | 1926–1927 |
| Clubs3: | Manchester City |
| Caps3: | 22 |
| Goals3: | 11 |
| Years4: | 1927–1929 |
| Clubs4: | St Mirren |
| Caps4: | 10 |
| Goals4: | 4 |
| Years5: | 1929 |
| Clubs5: | Peebles Rovers |
| Clubs6: | Northfleet |
| Clubs7: | North Shields |
| Years8: | 1930 |
| Clubs8: | Hartlepool United |
| Caps8: | 3 |
| Goals8: | 2 |
| Years9: | 1930 |
| Clubs9: | Darlington |
| Caps9: | 7 |
| Goals9: | 1 |
| Clubs10: | Bath City |
| Nationalyears1: | 1924 |
| Nationalteam1: | Scotland |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 1 |
William Duncan Cowan (9 August 1896 – unknown) was a Scottish professional footballer. An inside right who could also play at inside left, he played in the Football League for Newcastle United, Manchester City, Hartlepool United and Darlington.[2]
Cowan also received one cap for Scotland, scoring his team's goal in a 1–1 draw with England in 1924[3] [4]