| William Parker | |
| Birth Date: | September 17, 1886 |
| Birth Place: | Walla Walla, Washington, United States |
| Death Place: | New York City, United States |
| Occupation: | Screenwriter |
| Years Active: | 1913–1921 |
William Parker (September 17, 1886 – July 8, 1941) was an American screenwriter. He wrote the screenplay for more than thirty films from 1913 to 1921.