United States presidential election in Idaho, 2008 By county By county

| County | Obama__1 | Obama__2 | McCain__3 | McCain__4 |
|---|---|---|---|---|
| Ada | 46.90% | 82023 | 53.10% | 92879 |
| Adams | 32.46% | 728 | 67.54% | 1515 |
| Bannock | 43.32% | 14792 | 56.68% | 19356 |
| Bear Lake | 17.44% | 502 | 82.56% | 2377 |
| Benewah | 34.72% | 1407 | 65.28% | 2646 |
| Bingham | 26.56% | 4424 | 73.44% | 12230 |
| Blaine | 66.89% | 6947 | 33.11% | 3439 |
| Boise | 33.76% | 1240 | 66.24% | 2433 |
| Bonner | 41.30% | 7840 | 58.70% | 11145 |
| Bonneville | 28.02% | 11415 | 71.98% | 29324 |
| Boundary | 32.24% | 1474 | 67.76% | 3098 |
| Butte | 23.14% | 318 | 76.86% | 1056 |
| Camas | 30.71% | 187 | 69.29% | 422 |
| Canyon | 32.03% | 20147 | 67.97% | 42752 |
| Caribou | 17.23% | 553 | 82.77% | 2656 |
| Cassia | 17.30% | 1305 | 82.70% | 6240 |
| Clark | 17.34% | 64 | 82.66% | 305 |
| Clearwater | 32.04% | 1211 | 67.96% | 2569 |
| Custer | 26.68% | 620 | 73.32% | 1704 |