The Sergeant-at-Arms is the senior official of the Canadian House of Commons. In this role, the sergeant-at-arms is responsible for the building services and security of the House of Commons, and is appointed by the Governor General acting on the advice of the Federal cabinet. The sergeant-at-arms carries the mace, the symbol of the authority of the House, in the daily parade into the House of Commons chamber.

Provincial legislative assemblies, houses of assembly, national assemblies, and provincial parliaments (the nomenclature for legislatures varying between provinces) also employ sergeants-at-arms.

During the 2014 shootings at Parliament Hill, Ottawa, the then sergeant-at-arms of the House of Commons, Kevin M. Vickers, shot and killed a gunman who had gained access to the Centre Block of the Canadian Parliament buildings.

• Lieutenant Colonel Donald William MacDonnell (1867 to 1892) - Sergeant-at-Arms of the Legislative Assembly of the Province of Canada (1854-1867)
• Lieutenant Colonel Henry Robert Smith CMG (1892 to 1917) - Deputy Sergeant-at-Arms (1872 to 1892)
• Lieutenant Colonel Henry William Bowie (1918 to 1930) - Deputy Sergeant-at-Arms (1891 to 1918)
• Lieutenant Colonel Harry Judson Coghill (1930 to 1934) - died in office
• Brigadier Milton Fowler Gregg, V.C. (1934 to 1939)
• Arthur Beauchesne (1939 to 1945) - acting Sergeant-at-Arms along with his duties as Clerk of the House of Commons
• Lieutenant Colonel William John Franklin (1945 to 1960)
• Lieutenant Colonel David Vivian Currie, VC, CD (1960 to 1978)
• Major General Maurice Gaston Cloutier (1978 to 2005) - died in office
• Audrey Elizabeth O'Brien (2005 to 2006) - interim head of Parliamentary Precinct Services following death of Cloutier and Deputy Clerk of the House of Commons
• Chief Superintendent Kevin Vickers (2006 to January 2015)
• Assistant Commissioner Pat McDonell (January 2015 to present)