| REP | LIB | DEM | |
|---|---|---|---|
| Counties | Keith Johnson | Greg Nalder | Bob Sonnichsen |
| Ada | 57,908 | 4,323 | 38,315 |
| Adams | 1,066 | 85 | 336 |
| Bannock | 12,137 | 1,636 | 9,813 |
| Bear Lake | 1,772 | 54 | 486 |
| Benewah | 1,738 | 172 | 1,044 |
| Bingham | 8,168 | 662 | 3,112 |
| Blaine | 2,378 | 345 | 3,090 |
| Boise | 1,575 | 181 | 731 |
| Bonner | 5,773 | 605 | 3,763 |
| Bonneville | 19,000 | 1,461 | 6,929 |
| Boundary | 1,678 | 139 | 783 |
| Butte | 801 | 60 | 349 |
| Camas | 244 | 17 | 114 |
| Canyon | 24,065 | 1,534 | 9,771 |
| Caribou | 1,782 | 103 | 527 |
| Cassia | 4,512 | 183 | 1,094 |
| Clark | 216 | 11 | 60 |
| Clearwater | 1,643 | 121 | 1,136 |
| Custer | 1,214 | 79 | 325 |
| Elmore | 3,286 | 272 | 1,453 |
| Franklin | 2,593 | 108 | 456 |
| Fremont | 2,821 | 216 | 715 |
| Gem | 3,246 | 288 | 1,414 |
| Gooding | 2,407 | 237 | 1,201 |
| Idaho | 4,188 | 281 | 1,494 |
| Jefferson | 5,197 | 243 | 1,071 |
| Jerome | 2,780 | 149 | 1,497 |
| Kootenai | 18,547 | 1,554 | 10,496 |
| Latah | 4,824 | 586 | 5,544 |
| Lemhi | 2,389 | 135 | 727 |
| Lewis | 797 | 50 | 437 |
| Lincoln | 781 | 51 | 432 |
| Madison | 5,666 | 297 | 864 |
| Minidoka | 3,474 | 233 | 1,376 |
| Nez Perce | 5,895 | 472 | 5,407 |
| Oneida | 914 | 61 | 262 |
| Owyhee | 1,863 | 110 | 560 |
| Payette | 3,683 | 229 | 1,376 |
| Power | 1,352 | 80 | 707 |
| Shoshone | 1,642 | 234 | 2,112 |
| Teton | 1,229 | 106 | 829 |
| Twin Falls | 10,952 | 658 | 5,465 |
| Valley | 1,870 | 149 | 1,058 |
| Washington | 2,095 | 94 | 811 |
| TOTAL | 242,161 | 18,664 | 129,542 |
| Plurality | 112,619 | ||
| Percentage | 62.0% | 4.8% | 33.2% |