| DEM | LIB | REP | |
|---|---|---|---|
| Counties | Marilyn Howard | Robbi L. Kier | Tom Luna |
| Ada | 61,674 | 2,204 | 41,051 |
| Adams | 682 | 62 | 811 |
| Bannock | 13,342 | 656 | 10,712 |
| Bear Lake | 1,056 | 44 | 1,294 |
| Benewah | 1,506 | 153 | 1,446 |
| Bingham | 5,643 | 243 | 6,342 |
| Blaine | 3,965 | 225 | 1,917 |
| Boise | 1,249 | 92 | 1,269 |
| Bonner | 5,101 | 409 | 5,031 |
| Bonneville | 13,491 | 519 | 14,257 |
| Boundary | 1,163 | 104 | 1,431 |
| Butte | 798 | 24 | 469 |
| Camas | 191 | 12 | 194 |
| Canyon | 17,588 | 954 | 18,296 |
| Caribou | 939 | 65 | 1,494 |
| Cassia | 2,667 | 115 | 3,153 |
| Clark | 108 | 6 | 183 |
| Clearwater | 1,754 | 91 | 1,194 |
| Custer | 832 | 35 | 876 |
| Elmore | 2,638 | 139 | 2,470 |
| Franklin | 1,055 | 106 | 2,039 |
| Fremont | 1,813 | 68 | 2,037 |
| Gem | 2,589 | 123 | 2,564 |
| Gooding | 2,120 | 87 | 1,879 |
| Idaho | 2,820 | 226 | 3,208 |
| Jefferson | 2,363 | 113 | 4,140 |
| Jerome | 2,181 | 80 | 2,261 |
| Kootenai | 14,567 | 1,094 | 15,751 |
| Latah | 7,538 | 362 | 3,552 |
| Lemhi | 1,228 | 100 | 1,996 |
| Lewis | 796 | 32 | 529 |
| Lincoln | 693 | 29 | 595 |
| Madison | 2,817 | 90 | 3,791 |
| Minidoka | 2,681 | 123 | 2,444 |
| Nez Perce | 7,694 | 250 | 4,358 |
| Oneida | 519 | 33 | 695 |
| Owyhee | 1,101 | 79 | 1,434 |
| Payette | 2,457 | 125 | 2,933 |
| Power | 1,217 | 38 | 993 |
| Shoshone | 2,562 | 198 | 1,360 |
| Teton | 1,232 | 61 | 959 |
| Twin Falls | 9,752 | 288 | 7,686 |
| Valley | 1,812 | 80 | 1,387 |
| Washington | 1,572 | 47 | 1,537 |
| TOTAL | 211,566 | 9,984 | 184,018 |
| Plurality | 27,548 | ||
| Percentage | 52.2% | 2.5% | 45.4% |