Sir John Alexander Boyd, KCMG (April 23, 1837 – November 23, 1916) was a Canadian lawyer and judge. John Alexander Boyd was born in Toronto on April 23, 1837. Educated at Upper Canada College and the University of Toronto, Boyd began his career in 1860 when he was articled to David Breakenridge Read. He was appointed a Knight Commander of the Order of St Michael and St George (KCMG) during the visit to Canada of TRH the Duke and Duchess of Cornwall and York (later King George V and Queen Mary) in October 1901.