2004 Senatorial General Election Data Graphs - Maryland
by County
| Allegany | Mikulski | 53.4% | |
| Pipkin | 45.1% | |
| Other | 1.5% | |
| Anne Arundel | Mikulski | 54.9% | |
| Pipkin | 43.6% | |
| Other | 1.5% | |
| Baltimore | Mikulski | 62.7% | |
| Pipkin | 35.8% | |
| Other | 1.5% | |
| Calvert | Mikulski | 50.7% | |
| Pipkin | 47.8% | |
| Other | 1.4% | |
| Caroline | Mikulski | 49.8% | |
| Pipkin | 48.9% | |
| Other | 1.4% | |
| Carroll | Mikulski | 41.4% | |
| Pipkin | 57.2% | |
| Other | 1.4% | |
| Cecil | Mikulski | 47.3% | |
| Pipkin | 51.3% | |
| Other | 1.4% | |
| Charles | Mikulski | 60.5% | |
| Pipkin | 38.0% | |
| Other | 1.5% | |
| Dorchester | Mikulski | 58.3% | |
| Pipkin | 40.7% | |
| Other | 1.0% | |
| Frederick | Mikulski | 50.4% | |
| Pipkin | 48.1% | |
| Other | 1.6% | |
| Garrett | Mikulski | 37.8% | |
| Pipkin | 61.0% | |
| Other | 1.2% | |
| Harford | Mikulski | 48.1% | |
| Pipkin | 50.8% | |
| Other | 1.2% | |
| Howard | Mikulski | 62.9% | |
| Pipkin | 35.5% | |
| Other | 1.6% | |
| Kent | Mikulski | 56.3% | |
| Pipkin | 42.5% | |
| Other | 1.2% | |
| Montgomery | Mikulski | 72.1% | |
| Pipkin | 26.2% | |
| Other | 1.6% | |
| Prince George's | Mikulski | 85.6% | |
| Pipkin | 12.9% | |
| Other | 1.5% | |
| Queen Anne's | Mikulski | 43.3% | |
| Pipkin | 55.5% | |
| Other | 1.1% | |
| St. Mary's | Mikulski | 50.0% | |
| Pipkin | 48.3% | |
| Other | 1.7% | |
| Somerset | Mikulski | 58.9% | |
| Pipkin | 40.0% | |
| Other | 1.1% | |
| Talbot | Mikulski | 53.1% | |
| Pipkin | 45.8% | |
| Other | 1.2% | |
| Washington | Mikulski | 46.9% | |
| Pipkin | 51.7% | |
| Other | 1.4% | |
| Wicomico | Mikulski | 54.3% | |
| Pipkin | 44.7% | |
| Other | 1.1% | |
| Worcester | Mikulski | 54.8% | |
| Pipkin | 44.4% | |
| Other | 0.9% | |
City| Baltimore | Mikulski | 86.2% | |
| Pipkin | 11.9% | |
| Other | 1.9% | |