
| Name | Show | Role Size | Age | Gender | Voice |
| Adam | The Love Note | lead | 9 - 12 | male | baritone |
| Adam Cook | An American in Paris | supporting | 25 - 35 | male | |
| Adam Lipschitz | Jewtopia | lead | 26 - 33 | male | spoken |
| Adam Nehemiah | Dessa Rose | supporting | 24 - 32 | male | tenor |
| Adam No-Name | Western Star | lead | 26 - 32 | male | tenor |
| Adam Over-Doo | Bartholomew Fair | - | male | ||
| Adam Pontipee | Seven Brides for Seven Brothers | lead | 30 - 43 | male | baritone |
| Adam/Noah | Children of Eden | lead | - | male | |
| Adamas | Les Boréades | N/A | - | male | baritone |
| Adario | Les Indes galantes | - | male | tenor | |
| Addaperle | The Wiz | supporting | 30 - 65 | female | mezzo |
| Addie | I Had a Ball | N/A | 21 - 32 | female | |
| Addie | The Little Foxes | 53 - 65 | N/A | spoken | |
| Addison Mizner | Bounce | lead | 25 - 35 | male | N/A |
| Adelaid Adams | Calamity Jane | cameo | 25 - 40 | female | alto |
| Adelaide | Guys and Dolls | supporting | 30 - 45 | female | mezzo |
| Adelaide Gisbourne | Bashville | cameo | - | female | |
| Adele | Jane Eyre | cameo | 7 - 11 | female | mezzo |
| Adele | Die Fledermaus (The Bat) | supporting | 18 - 30 | female | soprano |
| Adele Douglas | The Rivalry | supporting | 20 - 29 | female | spoken |