| William D. Swackhamer | |
| Office: | Member of the Nevada General Assembly for Eureka-Lander-Pershing |
| Term: | November 1946 – November 1972 |
| Office2: | Secretary of State of Nevada |
| Term2: | 1973 - 1987 |
| Governor2: | Mike O'Callaghan Robert List Richard Bryan |
| Predecessor2: | John Koontz |
| Successor2: | Frankie Sue Del Papa |
| Party: | Democratic |
| Birth Date: | 18 August 1914 |
| Birth Place: | Winnemucca, Nevada, United States |
| Death Place: | Meridian, Idaho, United States |
| Residence: | Carson City, Nevada |
| Spouse: | Joyce Marie Swackhamer |
William Delany "Swack" Swackhamer (August 18, 1914 - July 10, 2008), was an American politician who was a Democratic member of the Nevada General Assembly from 1946 to 1972. He was Speaker of the Assembly in 1957, 1958, 1965, and 1966. From 1967 to 1968, he served as Majority Leader of the Assembly.[1] From 1973 to 1987, he served as Secretary of State of Nevada. He was a veteran of World War II with the United States Army Air Forces.[2] He died after a stroke in 2008.[3]