William Henry Flack | |
|---|---|
 William Henry Flack | |
| Born | March 22, 1861 |
| Died | February 2, 1907 (aged 45) |
| Resting place | Morningside Cemetery, Malone, New York |
| Nationality | American |
| Occupation(s) | Politician and businessman |
| Predecessor | John Wilbur Dwight |
| Successor | George R. Malby |
William Henry Flack (March 22, 1861 – February 2, 1907) was a Republican member of the U.S. House of Representatives from New York from 1903 to 1907.