| Role | Voice Part | Classification |
|---|---|---|
| Zazà | Soprano | L |
| Milio Dufresne | Tenor | L |
| Cascart | Baritone | L |
| Anaide | Mezzo Soprano | S |
| Natalia | Soprano | S |
| Bussy | Baritone | S |
| Courtois | Baritone | S |
| Floriana | Soprano | B |
| Signora Dufresne | Soprano | B |
| Marco | Tenor | B |
| Augusto | Tenor | B |
| Toto (Antoinetta Dufresne) | Child Actress | S |
| Minimum Chorus: No chorus |