Clark, John James (Jack)
- Township: Embro & West Zorra
- Where born: Harrington West, West Zorra Township, Oxford County, Ontario, Canada
- Wars Served: World War I
- Country enlisted with: Canada
After his war service, John James Clark (Jack) was a store owner (1923-1944) and postmaster (1923-1938) in Harrington West, where he had been born and raised. He married Minnie Whetstone in 1916 and that was the first wedding in Lakeside Methodist Church, Lakeside, Ontario.