| W. J. Parkinson | |
| Office: | President pro tempore of the Washington Senate |
| Term Start: | November 6, 1889 |
| Term End: | January 7, 1891 |
| Predecessor: | Office established |
| Successor: | Eugene T. Wilson |
| Office1: | Member of the Washington State Senate |
| Constituency1: | 33rd |
| Term Start1: | January 7, 1891 |
| Term End1: | January 9, 1893 |
| Predecessor1: | Constituency established |
| Successor1: | W. H. Gilbert |
| Constituency2: | 24th |
| Term Start2: | November 6, 1889 |
| Term End2: | January 7, 1891 |
| Predecessor2: | Constituency established |
| Successor2: | A. T. Van de Vanter |
| Birth Date: | 10 May 1844 |
| Birth Place: | Ireland |
| Death Place: | Jackson, Mississippi, U.S. |
| Party: | Republican |
William J. Parkinson (May 10, 1844 – January 7, 1902) was an American politician in the state of Washington. He served in the Washington State Senate from 1889 to 1893.[1] From 1889 to 1891, he was President pro tempore of the Senate.[2] He died of a heart attack in 1902.[3] [4] [5]