| William D. Weidlein | |
| Birth Date: | 11 January 1892 |
| Birth Place: | Peabody, Kansas, U.S. |
| Death Place: | Cedar Rapids, Iowa, U.S. |
| Player Years1: | 1911–1913 |
| Player Team1: | Kansas |
| Player Positions: | Guard, Tackle |
| Coach Years1: | 1914 |
| Coach Team1: | Kansas (assistant) |
| Coach Years2: | 1915–1916 |
| Coach Team2: | Midland |
| Coach Years3: | 1923–1928 |
| Coach Team3: | Fort Hays State |
| Overall Record: | 26–32–6 |
William Dale Weidlein (January 11, 1892 – December 26, 1983)[1] was an American football coach. He served as the head football coach at Midland College (now known as Midland University) in Fremont, Nebraska, from 1915 to 1916 and Fort Hays State University in Hays, Kansas, from 1923 to 1928, compiling a career college football coaching record of 26–32–6.[2]
William was born in Peabody, Kansas, on January 11, 1892, of parents John Valentine Weidlein and Emma Belle (Van Dyke) Weidlein.[1] His uncle, Philip P. Weidlein, was the second mayor of Peabody, Kansas, in 1879.
William attended the University of Kansas and graduated in 1914. He was a member of the 108th engineers in France during World War I.[3] He married Ruth Rebecca Benning on December 16, 1917.[1] William died in Cedar Rapids, Iowa, on December 26, 1983, and was buried in the Leavenworth National Cemetery.[4]