
| Name | Show | Role Size | Age | Gender | Voice |
| Al/David | Balm in Gilead | cameo | - | male | |
| Aladdin | Aladdin (Prince Street Players' Version) | N/A | - | male | baritone |
| Aladdin | Aladdin Junior (Disney) | lead | - | male | baritone |
| Alain | Griselidis | supporting | 21 - 30 | male | tenor |
| Alamiro | Belisario | lead | 17 - 27 | male | tenor |
| Alan | Babes in Toyland | lead | 8 - 15 | male | alto |
| Alan | High School Musical | cameo | 14 - 18 | male | |
| Alan | Bare | cameo | 16 - 22 | male | tenor |
| Alan MacNally | Baby | lead | 46 - 52 | male | baritone |
| Alan Raleigh | God of Carnage | lead | 35 - 44 | male | spoken |
| Alan Squier | The Petrified Forest | lead | 30 - 50 | male | spoken |
| Alan Strang | Equus | lead | 15 - 19 | male | spoken |
| Alan Swann | My Favorite Year | N/A | - | male | |
| Alan Turing | Breaking the Code | lead | 35 - 45 | male | spoken |
| Alarbus | Titus Andronicus | cameo | 20 - 29 | male | mute |
| Alaura Kingsley/Carla | City of Angels | supporting | 22 - 45 | female | mezzo |
| Alberich | Das Rheingold (The Rhine Gold) | lead | 30 - 50 | male | bass-baritone |
| Alberich | Götterdämmerung | supporting | 45 - 70 | male | bass-baritone |
| Albert | Happy Hunting | N/A | - | male | |
| Albert | The Secret Garden | supporting | 30 - 45 | male | tenor |