United States presidential election in Idaho, 2004 By county By county

| County | Kerry__1 | Kerry__2 | Bush__3 | Bush__4 | Others__5 | Others__6 |
|---|---|---|---|---|---|---|
| Ada | 37.7% | 58523 | 61.0% | 94641 | 1.2% | 1866 |
| Adams | 26.9% | 555 | 71.2% | 1468 | 1.9% | 40 |
| Bannock | 37.0% | 12903 | 61.6% | 21479 | 1.3% | 462 |
| Bear Lake | 16.3% | 494 | 82.4% | 2506 | 1.3% | 40 |
| Benewah | 28.3% | 1148 | 69.7% | 2823 | 2.0% | 79 |
| Bingham | 21.8% | 3605 | 76.9% | 12734 | 1.4% | 226 |
| Blaine | 59.1% | 5992 | 39.8% | 4034 | 1.2% | 121 |
| Boise | 27.5% | 970 | 70.9% | 2501 | 1.6% | 56 |
| Bonner | 37.6% | 6649 | 60.5% | 10697 | 1.9% | 338 |
| Bonneville | 21.5% | 8356 | 77.3% | 30048 | 1.2% | 467 |
| Boundary | 29.0% | 1268 | 68.8% | 3012 | 2.3% | 99 |
| Butte | 22.8% | 321 | 76.6% | 1077 | 0.6% | 8 |
| Camas | 23.4% | 139 | 75.6% | 450 | 1.0% | 6 |
| Canyon | 24.1% | 13415 | 74.7% | 41599 | 1.2% | 684 |