| Censo Electoral | Votantes | Abstención | Votos nulos | Votos en blanco |
|---|---|---|---|---|
| 43.223 | 25.591 | 40,79 % | 394 (1,54%) | 519 (2,06%) |
| Candidatura | Votos | Porcentaje | Concejales |
|---|---|---|---|
| PSOE | 6.204 | 24,62% | 7 |
| FAC | 4.025 | 15,97% | 5 |
| Somos Siero | 3.697 | 14,67% | 4 |
| PP | 3.149 | 12,50% | 3 |
| IU | 2.876 | 11,41% | 3 |
| PVF | 1.439 | 5,71% | 1 |
| Ciudadanos | 1.338 | 5,31% | 1 |
| PINSI | 1.336 | 5,30% | 1 |
| CONCEJO | 477 | 1,89% | 0 |
| Vox | 137 | 0,54% | 0 |