Langdon, Robert Watson
- Township: Embro & West Zorra
- Branch: 1st Depot Battalion, Western Ontario Region.
- Regiment number: 3136672
- Date of birth: August 20, 1896
- Where born: West Zorra Township, Oxford County, Ontario, Canada
- Wars Served: World War I
- Years of service: May 23, 1918 -
- Country enlisted with: Canada
Robert Watson Langdon was born Aug. 20, 1896, son of Thomas and Helen Langdon of Lot 13, Concession 8, West Zorra. At the time of enlistment, he was a farmer. He later became a United Church minister.