| Sno. | Constituency | Type | State | Winning Candidate | Party | Electors | Votes | Turnout | Margin | Margin% | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2-Ramnagar-Bihar | GEN | Bihar | Chandra Mohan Rai | Bharatiya Janata Party | 200302 | 104534 | 52.20% | 919 | 0.90% | 2005 |
| 2 | 4-Bagaha-Bihar | SC | Bihar | Purnmasi Ram | Janata Dal (United) | 237157 | 119904 | 50.60% | 18391 | 15.30% | 2005 |
| 3 | 5-Lauriya-Bihar | GEN | Bihar | Pradeep Singh | Janata Dal (United) | 188125 | 98222 | 52.20% | 2024 | 2.10% | 2005 |
| 4 | 6-Nautan-Bihar | GEN | Bihar | Baidhanath Prasad Mahto | Janata Dal (United) | 195780 | 94597 | 48.30% | 5303 | 5.60% | 2005 |
| 5 | 7-Chanpatia-Bihar | GEN | Bihar | Satish Chandra Dubey | Bharatiya Janata Party | 189762 | 88836 | 46.80% | 20874 | 23.50% | 2005 |
| 6 | 8-Bettiah-Bihar | GEN | Bihar | Renu Devi | Bharatiya Janata Party | 249980 | 115271 | 46.10% | 16466 | 14.30% | 2005 |
| 7 | 9-Sikta-Bihar | GEN | Bihar | Khurshed Alias Firoz Alam | Indian National Congress | 185625 | 106074 | 57.10% | 7599 | 7.20% | 2005 |
| 8 | 10-Raxaul-Bihar | GEN | Bihar | Dr. Ajay Kumar Singh | Bharatiya Janata Party | 202531 | 96824 | 47.80% | 8449 | 8.70% | 2005 |
| 9 | 11-Sugauli-Bihar | GEN | Bihar | Ramchandra Sahni | Bharatiya Janata Party | 219751 | 110682 | 50.40% | 6605 | 6.00% | 2005 |
| 10 | 13-Harsidhi (S.C)-Bihar | GEN | Bihar | Maheshwar Singh | Lok Jan Shakti Party | 195598 | 96766 | 49.50% | 108 | 0.10% | 2005 |