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| Arcuri, Serge (1954 - ) Canada |
| Ardévol, José (1911 - 1981) Cuba |
| Argelli, Carlo (1969 - ) Italy |
| Argento, Dominick (1927 - ) U.S.A. |
| Argersinger, Charles (1951 - ) U.S.A. |
| Argiro, James (1950 - ) |
| Arho, Anneli (1951 - ) Finland |
| Ariza, Christopher (? - ) U.S.A. |
| Armbruester, Fred (1930 - ) Germany |
| Armbruster, René (1931 - 1991) Switzerland |
| Armenteros González, Eduardo (1956 - ) Spain |
| Armfelt, Carl (1956 - ) Finland |
| Armstrong, John Gordon (1952 - ) Canada |
| Armstrong, Philip (1961 - ) United Kingdom |
| Armstrong, Tom (1968 - ) United Kingdom |
| Arnecke, Jörn (1973 - ) Germany |
| Arneke, Jörn (1973 - ) Germany |
| Arnell, Richard (1917 - 2009) United Kingdom |
| Arnold, Lothar (1959 - ) Germany |
| Arnold, Malcolm (1921 - 2006) United Kingdom |
| Arnoldi, Natale (1960 - ) Italy |
| Arntzen, Kees (? - ) The Netherlands |
| Aron, Stephen (? - ) U.S.A. |
| Arran, John (1945 - ) United Kingdom |
| Arrieu, Claude (1903 - 1990) |
| Arrigo, Girolamo (1930 - ) Italy |
| Arrigo-Nelson, John (? - ) U.S.A. |
| Arrington, Devin (1978 - ) U.S.A. |
| Arseneault, Raynald (1945 - 1995) Canada |
| Arteaga, Edward (1950 - ) Canada |
| Artner, Norbert (1922 - 1971) Austria |
| Artyomov, Vyacheslav (1940 - ) Russia |
| Arvidsson-Bremmers, Per (1959 - ) Sweden |
| Arzoumanov, Valery (? - ) |
| Asafiev, Boris (1884 - 1949) Russia |
| Asanger, Thomas (1988 - ) Austria |
| Ascioti, Nicholas Anthony (1974 - ) U.S.A. |
| Asencio, Vicente (1908 - 1979) Spain |
| Asheim, Nils Henrik (1960 - ) Norway |
| Asia, Daniel (1953 - ) U.S.A. |
| Asíns Arbó, Miguel (1916 - ) Spain |
| Askim, Peter (? - ) U.S.A. |
| Askin, Ali N. (1962 - ) Germany |
| Aslanyan, Noubar (1943 - ) Israel |
| Asmara, Michael (1956 - ) Indonesia |
| Asmus, Bernd (1959 - ) Germany |
| Asplund, Jonas (1971 - ) Sweden |
| Asriel, André (1922 - ) Germany |
| Assad, Clarice (? - ) Brazil |
| Assad, Sérgio (1952 - ) Brazil |
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