| William P. Connery Sr. | |
| Office: | 34th Mayor of Lynn, Massachusetts |
| Term Start: | 1911 |
| Term End: | 1912 |
| Predecessor: | James E. Rich |
| Successor: | George H. Newhall |
| Birth Date: | September 1855 |
| Death Date: | November 1928 (aged 73) |
| Children: | Lawrence J. Connery, William P. Connery, Jr. |
William P. Connery Sr. (September 1855 - November 1928) was a Massachusetts politician who served as the 34th mayor of Lynn, Massachusetts. He was the father of U.S. Congressional Representatives Lawrence J. Connery and William P. Connery, Jr.