| Honorific-Prefix: | The Hon. |
| Alexander Boyd Baird | |
| Office: | Senator for St. John's, Newfoundland and Labrador |
| Appointed: | Louis St. Laurent |
| Term Start: | August 17, 1949 |
| Term End: | November 23, 1967 |
| Birth Date: | 31 August 1891 |
| Birth Place: | St. John's, Newfoundland Colony |
| Party: | Liberal |
| Rank: | Major |
| Unit: | Royal Newfoundland Regiment |
| Battles: | World War I |
Alexander Boyd Baird (August 31, 1891 - November 23, 1967) was a Canadian businessman and Senator.
Born in St. John's, Newfoundland Colony, he was summoned to the Canadian Senate in 1949 and represented the senatorial division of St. John's, Newfoundland and Labrador. A Liberal, he served until he died in 1967.
Baird served as a Major in the Royal Newfoundland Regiment during World War I from 1914 to 1918.