| Partido | Senadores |
| PMDB | 18 |
| PT | 14 |
| PSDB | 11 |
| PDT | 6 |
| PSB | 6 |
| DEM | 5 |
| PP | 5 |
| PSD | 4 |
| PR | 3 |
| PTB | 3 |
| PCdoB | 1 |
| PPS | 1 |
| PRB | 1 |
| PSC | 1 |
| Psol | 1 |
| SD | 1 |
| Total | 81 |
| Partido | Senadores |
| PMDB | 18 |
| PT | 14 |
| PSDB | 11 |
| PDT | 6 |
| PSB | 6 |
| DEM | 5 |
| PP | 5 |
| PSD | 4 |
| PR | 3 |
| PTB | 3 |
| PCdoB | 1 |
| PPS | 1 |
| PRB | 1 |
| PSC | 1 |
| Psol | 1 |
| SD | 1 |
| Total | 81 |