Evolución do voto en Marin
| Votos | Aut. 93 | Cong.1996 | Aut. 97 | Muni. 1999 | Cong. 2000 | Aut. 2001 | Mun. 2003 | Cong. 2004 |
| PP | 5.558 | 6.513 | 6.163 | 4.002 | 6.993 | 5.505 | 4.345 | 6.669 |
| PSOE | 2.979 | 4.273 | 2.230 | 4.141 | 3.034 | 2.905 | 4.474 | 5.676 |
| BNG | 2.245 | 2.113 | 3.722 | 3.048 | 2.181 | 2.386 | 1.712 | 1.664 |
| % | ||||||||
| Partido | Aut. 93 | Cong.1996 | Aut. 97 | Muni. 1999 | Cong. 2000 | Aut. 2001 | Mun. 2003 | Cong. 2004 |
| PP | 50,59% | 47,96% | 49,35% | 33,69% | 55,08% | 48,50% | 33,87% | 45,20% |
| PSOE | 27,12% | 31,47% | 17,86% | 34,86% | 23,90% | 25,60% | 34,88% | 38,47% |
| BNG | 20,44% | 15,56% | 29,80% | 25,66% | 17,18% | 21% | 13,35% | 11,28% |