| William D. Allen | |
| Birth Date: | 13 February 1886 |
| Birth Place: | Grandview, Greene County, Tennessee, U.S. |
| Death Place: | Minot, North Dakota, U.S. |
| Coach Sport1: | Football |
| Coach Years2: | 1936–1945 |
| Coach Team2: | Minot State |
| Coach Sport3: | Basketball |
| Coach Years4: | 1937–1946 |
| Coach Team4: | Minot State |
| Overall Record: | 21–28–8 (football) 88–27 (basketball) |
William Drury "Doc" Allen (February 13, 1886 – December 27, 1979) was an American football and basketball coach. He served as the head football coach at Minot State Teacher's College—now known as Minot State University—in Minot, North Dakota from 1936 to 1945, compiling a record of 21–28–8.[1] Allen was also the head basketball coach at Minot State from 1937 to 1946, tallying mark of 88–27.[2]