This is a list of composers who are either native to the country of Canada, are a citizen of that nation, or have spent a major portion of their career living and working in Canada. The list is arranged in alphabetical order:

• John Abram (born 1959)
• Murray Adaskin (1906–2002)
• Andrew Ager (born 1962)
• Kati Agócs (born 1975)
• Lucio Agostini (1913–1996)
• Robert Aitken (born 1939)
• J. E. P. Aldous (1853–1934)
• Gaston Allaire (born 1916)
• Émilien Allard (1915–1977)
• Joseph Allard (1873–1947)
• Peter Allen (born 1952)
• Paul Ambrose (1868–1941)
• Robert Ambrose (1824–1908)
• W.H. Anderson (1882–1955)
• Samuel Andreyev (born 1981)
• Humfrey Anger (1862–1913)
• István Anhalt (1919-2012)
• Paul Anka (born 1941)
• Louis Applebaum (1918–2000)
• Violet Archer (1913–2000)
• John Arpin (1936–2007)
• Raynald Arseneault (1945–1995)