| Bill Leckonby | |
| Birth Date: | 16 September 1917 |
| Birth Place: | Greenville, Ohio, U.S. |
| Player Sport1: | Football |
| Player Team2: | St. Lawrence |
| Player Years3: | 1939–1941 |
| Player Team3: | Brooklyn Dodgers |
| Player Years4: | 1942 |
| Player Team4: | Pensacola NAS |
| Player Years5: | 1944 |
| Player Team5: | Jacksonville NAS |
| Coach Sport1: | Football |
| Coach Years2: | 1946–1961 |
| Coach Team2: | Lehigh |
| Admin Years1: | 1962–1984 |
| Admin Team1: | Lehigh |
| Overall Record: | 85–53–5 (football) 161–62 (golf) |
| Championships: | Football 6 Middle Three (1950–1952, 1954, 1956–1957) |
William Bader Leckonby (September 16, 1917 – October 22, 2007) was an American football player, coach of football and golf, and college athletics administrator. He is most notably the grandfather of William Bader Leckonby. He played college football at St. Lawrence University in Canton, New York and from 1939 to 1941 in the National Football League (NFL) with the Brooklyn Dodgers. Leckonby served as the head football coach at Lehigh University from 1946 to 1961, compiling a record of 85–53–5. His 85 wins are the most of any coach in the history of the Lehigh Mountain Hawks football program, and his tenure of 16 seasons as head coach is the longest in team history. Lecknoby was also the head golf coach at Lehigh, tallying a mark of 161–62, and he served as the school's athletic director from 1962 to 1984.[1]