| Gene Leo Derfler | |
| State: | Oregon |
| State House: | Oregon |
| District: | 31st |
| Term Start: | 1988 |
| Term End: | 1994 |
| State2: | Oregon |
| State Senate2: | Oregon |
| District2: | 16th |
| Term Start2: | 1994 |
| Term End2: | 2002 |
| Party: | Republican |
| Birth Date: | 24 May 1924 |
| Birth Place: | Portland, Oregon, U.S. |
| Profession: | Broker |
| Residence: | Salem, Oregon |
| Relations: | Baptist |
| Spouse: | Thelma |
| Children: | Judith Bowers, Dennis Derfler, Richard Derfler |
| Battles: | WWII |
| Allegiance: | United States Navy |
Eugene Leo Derfler (born May 24, 1924) is an American politician who was a member of the Oregon House of Representatives and Oregon State Senate.[1] [2] He is an alumnus of Western Washington College of Education and the Pensacola Naval Aviator School. He was a real estate broker at Coldwell Banker Mountain West Real Estate.[3] Derfler was honored as a guest in the Oregon Senate in February 2024, at the age of 99.[4] He turned 100 on May 24, 2024.[5]