| DEM | REP | |
|---|---|---|
| Counties | Brit Groom | Alan G. Lance |
| Ada | 28,286 | 61,039 |
| Adams | 407 | 1,181 |
| Bannock | 9,365 | 12,915 |
| Bear Lake | 581 | 1,406 |
| Benewah | 1,101 | 1,588 |
| Bingham | 3,077 | 8,420 |
| Blaine | 2,428 | 2,761 |
| Boise | 627 | 1,583 |
| Bonner | 4,404 | 5,923 |
| Bonneville | 6,470 | 18,259 |
| Boundary | 1,000 | 1,811 |
| Butte | 410 | 747 |
| Camas | 107 | 314 |
| Canyon | 8,505 | 23,678 |
| Caribou | 542 | 1,723 |
| Cassia | 1,090 | 4,605 |
| Clark | 87 | 289 |
| Clearwater | 1,236 | 1,726 |
| Custer | 476 | 1,114 |
| Elmore | 1,260 | 3,658 |
| Franklin | 724 | 2,423 |
| Fremont | 801 | 3,033 |
| Gem | 1,270 | 3,434 |
| Gooding | 1,091 | 2,814 |
| Idaho | 2,177 | 3,270 |
| Jefferson | 1,313 | 4,614 |
| Jerome | 1,080 | 3,544 |
| Kootenai | 10,335 | 17,778 |
| Latah | 5,490 | 5,800 |
| Lemhi | 954 | 2,316 |
| Lewis | 533 | 766 |
| Lincoln | 578 | 639 |
| Madison | 1,088 | 5,135 |
| Minidoka | 1,409 | 3,856 |
| Nez Perce | 5,231 | 7,221 |
| Oneida | 310 | 898 |
| Owyhee | 573 | 1,980 |
| Payette | 1,385 | 3,801 |
| Power | 712 | 1,425 |
| Shoshone | 2,181 | 1,624 |
| Teton | 624 | 1,073 |
| Twin Falls | 5,003 | 12,097 |
| Valley | 947 | 2,111 |
| Washington | 848 | 2,421 |
| TOTAL | 118,116 | 248,813 |
| Plurality | 130,697 | |
| Percentage | 32.2% | 67.8% |