| William Wallace Lambdin | |
| Office: | Judge of the United States District Court for the Southern District of Georgia |
| Term Start: | March 3, 1915 |
| Term End: | December 20, 1916 |
| Appointer: | Woodrow Wilson |
| Predecessor: | Seat established by 38 Stat. 959 |
| Successor: | Beverly Daniel Evans Jr. |
| Birth Name: | William Wallace Lambdin |
| Birth Date: | 25 October 1861 |
| Birth Place: | Upson County, Georgia |
| Education: | University of Georgia (A.B.) read law |
William Wallace Lambdin (October 25, 1861 – December 20, 1916) was a United States district judge of the United States District Court for the Southern District of Georgia.
Born in Upson County, Georgia, Lambdin received an Artium Baccalaureus degree from the University of Georgia in 1879 and read law to enter the bar in 1888. He was in private practice in Atlanta, Georgia from 1888 to 1899, then in Barnesville, Georgia until 1906, and then in Waycross, Georgia from 1906 to 1915.
On March 3, 1915, Lambdin was nominated by President Woodrow Wilson to a new seat on the United States District Court for the Southern District of Georgia created by 38 Stat. 959. He was confirmed by the United States Senate on March 3, 1915, and received his commission the same day. Lambdin served in that capacity for little over a year and a half, until his death on December 20, 1916.