| Billy P. Williamson | |
| Coach Years1: | 1898 |
| Coach Team1: | Kansas State |
| Overall Record: | 1–1–2 |
William P. Williamson was an American college football coach. He served as the third head football coach at Kansas State Agricultural College, now Kansas State University. He held the position for one season in 1898, compiling a record of 1–1–2.