Adams, Henry John MacKay
- Township: Embro & West Zorra
- Rank: Lieutenant
- Branch: 22nd Regiment; 9th Battalion
- Date of birth: September 27, 1881
- Where born: Embro, West Zorra Township, Oxford County, Ontario. Canada
- Wars Served: World War I
- Country enlisted with: Canada
Lieutenant Henry John MacKay Adams was born Sept. 27, 1881, son of Dr. Henry and Christina (MacKay) Adams of 108 Commissioner St., Embro. He became a physician and lived in Victoria, B.C.
He enlisted with the 9th Battalion after having served with the 22nd Regiment.
He married Phyllis Mary Hope Eberts Feb. 5, 1918 in Victoria, British Columbia.