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.
Head coaching record
| Year | Team | Overall | Conference | Standing | Bowl/playoffs | ||||
|---|---|---|---|---|---|---|---|---|---|
| Kansas State Aggies (Independent) (1898) | |||||||||
| 1898 | Kansas State | 1–1–2 | |||||||
| Kansas State: | 1–1–2 | ||||||||
| Total: | 1–1–2 | ||||||||