| Lester T. Parker | |
| Office: | President pro tempore of the Washington Senate |
| Term Start: | January 10, 1949 |
| Term End: | January 8, 1951 |
| Predecessor: | Victor Zednick |
| Successor: | Ted F. Schroeder |
| State Senate1: | Washington |
| District1: | 21st |
| Term Start1: | January 11, 1943 |
| Term End1: | January 8, 1951 |
| Preceded1: | Frank L. Morgan |
| Succeeded1: | Andrew Winberg |
| Birth Name: | Lester Thomas Parker |
| Birth Date: | 27 May 1900 |
| Birth Place: | Seattle, Washington, U.S. |
| Death Place: | Aberdeen, Washington, U.S. |
| Party: | Republican |
Lester Thomas Parker (May 27, 1900 – August 8, 1974) was an American politician in the state of Washington. He served in the Washington State Senate from 1943 to 1951.[1] From 1949 to 1951, he was President pro tempore of the Senate.[2]