William P. Jackson | |
|---|---|
 | |
| Treasurer of Maryland | |
| In office 1918–1920 | |
| Governor | Emerson Harrington |
| Preceded by | John M. Dennis |
| Succeeded by | John M. Dennis |
| United States Senator from Maryland | |
| In office November 29, 1912 – January 28, 1914 | |
| Appointed by | Phillips Lee Goldsborough |
| Preceded by | Isidor Rayner |
| Succeeded by | Blair Lee |
| Personal details | |
| Born | January 11, 1868 Salisbury, Maryland |
| Died | March 7, 1939 (aged 71) Salisbury, Maryland |
| Political party | Republican |
| Signature | .png){kind=small} |
William Purnell Jackson (January 11, 1868 – March 7, 1939) was a Republican member of the United States Senate, representing the State of Maryland from 1912 to 1914. His father, William Humphreys Jackson, was a U.S. Congressman from Maryland.