# 2004 United States Senate election in Maryland

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Ballot measures
Question P :
Government :
vte :
The 2004 United States Senate election in Maryland was held on November 2, 2004. Incumbent Democratic U.S. Senator Barbara Mikulski won re-election to a fourth term. This is the most recent time that a Democratic Senate candidate has won Allegeny County, Caroline County, St. Mary's County or Worcester County. This is the last time that the winning candidate carried a majority of Maryland's county-level jurisdictions in a United States Senate election in Maryland.

## Democratic primary
### Candidates

* Barbara Mikulski, incumbent U.S. Senator
* Robert Kaufman, social organizer
* Sid Altman, accountant

### Results

Democratic Primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Barbara A. Mikulski (Incumbent) | 408,848 | 89.88% |
| | Democratic | A. Robert Kaufman | 32,127 | 7.06% |
| | Democratic | Sid Altman | 13,901 | 3.06% |
| Total votes | Total votes | Total votes | 454,876 | 100.00% |

## Republican primary
### Candidates

* Ray Bly, Vietnam War veteran
* Earl S. Gordon, surveyor
* Dorothy Curry Jennings, educator
* James A. Kodak, research associate at the University of Maryland
* Eileen Martin, educator
* E. J. Pipkin, State Senator
* John Stafford, government bureaucrat
* Corrogan R. Vaughn, Baptist deacon
* Gene Zarwell, perennial candidate

### Results

Republican Primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | E. J. Pipkin | 70,229 | 50.58% |
| | Republican | John Stafford | 14,661 | 10.56% |
| | Republican | Eileen Martin | 11,748 | 8.46% |
| | Republican | Dorothy Curry Jennings | 10,401 | 7.49% |
| | Republican | Earl S. Gordon | 8,233 | 5.93% |
| | Republican | Gene Zarwell | 6,865 | 4.94% |
| | Republican | Ray Bly | 6,244 | 4.50% |
| | Republican | James A. Kodak | 5,328 | 3.84% |
| | Republican | Corrogan R. Vaughn | 5,146 | 3.71% |
| Total votes | Total votes | Total votes | 138,855 | 100.00% |

## General election
### Candidates

* Maria Allwine (G)
* Barbara Mikulski (D), incumbent U.S. Senator
* E. J. Pipkin (R), State Senator
* Thomas Trump (C)

### Predictions

| Source | Ranking | As of |
| Sabato's Crystal Ball | Safe D | November 1, 2004 |

### Results

United States Senate election in Maryland, 2004 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Barbara A. Mikulski (Incumbent) | 1,504,691 | 64.80% | −5.70% |
| | Republican | E. J. Pipkin | 783,055 | 33.72% | +4.23% |
| | Green | Maria Allwine | 24,816 | 1.07% | |
| | Constitution | Thomas Trump | 9,009 | 0.39% | |
| | Write-ins | | 360 | 0.02% | |
| Majority | Majority | Majority | 721,636 | 31.08% | −9.93% |
| Total votes | Total votes | Total votes | 2,321,931 | 100.00% | |
| | Democratic hold | Democratic hold | Swing | | |

### Results by county

| County | Barbara A. Mikulski Democratic | Barbara A. Mikulski Democratic | E.J. Pipkin Republican | E.J. Pipkin Republican | Maria Allwine Green | Maria Allwine Green | Margin | Margin | Total Votes Cast |
| County | # | % | # | % | # | % | # | % | Total Votes Cast |
| Allegany | 15238 | 53.67% | 12882 | 45.37% | 271 | 0.95% | 2356 | 8.30% | 28391 |
| Anne Arundel | 129166 | 55.16% | 102522 | 43.79% | 2458 | 1.05% | 26644 | 11.38% | 234146 |
| Baltimore (City) | 172427 | 86.55% | 23759 | 11.93% | 3045 | 1.53% | 148668 | 74.62% | 199231 |
| Baltimore (County) | 217688 | 63.00% | 124092 | 35.91% | 3781 | 1.09% | 93596 | 27.09% | 345561 |
| Calvert | 19543 | 50.97% | 18422 | 48.05% | 374 | 0.98% | 1121 | 2.92% | 38339 |
| Caroline | 5543 | 50.09% | 5439 | 49.15% | 84 | 0.76% | 104 | 0.94% | 11066 |
| Carroll | 32391 | 41.64% | 44704 | 57.47% | 692 | 0.89% | -12313 | -15.83% | 77787 |
| Cecil | 17371 | 47.56% | 18843 | 51.59% | 310 | 0.85% | -1472 | -4.03% | 36524 |
| Charles | 34305 | 60.89% | 21547 | 38.24% | 491 | 0.87% | 12758 | 22.64% | 56343 |
| Dorchester | 7571 | 58.52% | 5284 | 40.84% | 82 | 0.63% | 2287 | 17.68% | 12937 |
| Frederick | 49336 | 50.60% | 47081 | 48.29% | 1081 | 1.11% | 2255 | 2.31% | 97498 |
| Garrett | 4540 | 38.01% | 7330 | 61.37% | 73 | 0.61% | -2790 | -23.36% | 11943 |
| Harford | 53444 | 48.24% | 56465 | 50.96% | 890 | 0.80% | -3021 | -2.73% | 110799 |
| Howard | 82479 | 63.14% | 46610 | 35.68% | 1538 | 1.18% | 35869 | 27.46% | 130627 |
| Kent | 5117 | 56.54% | 3860 | 42.65% | 73 | 0.81% | 1257 | 13.89% | 9050 |
| Montgomery | 291839 | 72.48% | 106101 | 26.35% | 4702 | 1.17% | 185738 | 46.13% | 402642 |
| Prince George's | 264088 | 85.96% | 39863 | 12.98% | 3270 | 1.06% | 224225 | 72.98% | 307221 |
| Queen Anne's | 9332 | 43.52% | 11964 | 55.80% | 146 | 0.68% | -2632 | -12.27% | 21442 |
| St. Mary's | 18440 | 50.37% | 17802 | 48.63% | 368 | 1.01% | 638 | 1.74% | 36610 |
| Somerset | 5157 | 59.21% | 3501 | 40.20% | 51 | 0.59% | 1656 | 19.01% | 8709 |
| Talbot | 9855 | 53.26% | 8501 | 45.94% | 147 | 0.79% | 1354 | 7.32% | 18503 |
| Washington | 26431 | 47.11% | 29181 | 52.01% | 496 | 0.88% | -2750 | -4.90% | 56108 |
| Wicomico | 19866 | 54.48% | 16348 | 44.83% | 251 | 0.69% | 3518 | 9.65% | 36465 |
| Worcester | 13524 | 54.93% | 10954 | 44.49% | 142 | 0.58% | 2570 | 10.44% | 24620 |
| Total | 1504691 | 65.07% | 783055 | 33.86% | 24816 | 1.07% | 721636 | 31.21% | 2312562 |

#### Counties that flipped from Democratic to Republican

* Carroll (largest municipality: Eldersburg)
* Cecil (largest municipality: Elkton)
* Harford (largest municipality: Aberdeen)
* Queen Anne's (largest municipality: Stevensville)
* Washington (largest municipality: Hagerstown)