| David Llewelyn | |
| Fullname: | David John Llewelyn |
| Birth Date: | 1949 8, df=y |
| Birth Place: | Cardiff, Wales |
| Years1: | 1969–1972 |
| Caps1: | 6 |
| Goals1: | 0 |
| Years2: | 1973–1975 |
| Caps2: | 13 |
| Goals2: | 3 |
| Years3: | 1974–1975 |
| Clubs3: | → Mansfield Town (loan) |
| Caps3: | 8 |
| Goals3: | 0 |
| Totalcaps: | 27 |
| Totalgoals: | 3 |
David John Llewelyn (born 9 August 1949) is a Welsh former professional footballer who played in the Football League for Mansfield Town, Peterborough United and West Ham United.