European Parliament election, 2009 (Slovenia) Opinion polls Opinion polls

| Source_ | Date_ | DeSUS | Zares | NLPD |
|---|---|---|---|---|
| Mediana | May 11–13 | 11.7% (1) | 8.6% | 2.2% |
| Delo | May 12–14 | 5.5% | 11% (1) | N/A |
| Delo | May 21–22 | 9% (1) | 11% (1) | N/A |
| Zurnal | May 28 | 6% | 12% (1) | N/A |
| Delo | May 27–28 | 7% | 13% (1) | N/A |
| Mediana | May 25–27 | 11.1% (1) | 8% | 1.2% |