Henry John Boulton, QC (1790 – June 18, 1870) was a lawyer and political figure in Upper Canada and the Province of Canada, as well as Chief Justice of Newfoundland. Boulton began his legal career under the tutelage of John Beverly Robinson, one of the leaders of the Family Compact, succeeding Robinson first as Solicitor General of Upper Canada, and then as Attorney General. After election to the Legislative Assembly of Upper Canada in 1830, Boulton opposed William Lyon Mackenzie, who in turn considered him one of the worst supporters of the Family Compact. His opposition to Mackenzie led to his dismissal by the British government from the post of Attorney General, but he was then appointed Chief Justice of Newfoundland, a separate colony from Upper Canada. After a tumultuous term as Chief