William Henry Irwin | |
|---|---|
 Will Irwin in May 1918 | |
| Born | September 14, 1873 |
| Died | February 24, 1948 (aged 74) |
| Nationality | American |
| Occupation(s) | Journalist and author |
| Spouse | Inez Haynes Irwin |
William Henry Irwin (September 14, 1873 – February 24, 1948) was an American author, writer, and journalist who was associated with the muckrakers.