| LIB | REP | |
|---|---|---|
| Counties | Ronald E. Perry | Ben Ysursa |
| Ada | 21,123 | 78,698 |
| Adams | 261 | 1,187 |
| Bannock | 7,367 | 15,665 |
| Bear Lake | 287 | 1,957 |
| Benewah | 732 | 2,071 |
| Bingham | 2,366 | 9,387 |
| Blaine | 1,927 | 3,603 |
| Boise | 567 | 1,921 |
| Bonner | 2,811 | 6,896 |
| Bonneville | 5,727 | 21,190 |
| Boundary | 545 | 1,959 |
| Butte | 228 | 958 |
| Camas | 75 | 300 |
| Canyon | 7,279 | 27,846 |
| Caribou | 341 | 2,047 |
| Cassia | 840 | 4,955 |
| Clark | 38 | 250 |
| Clearwater | 688 | 2,078 |
| Custer | 256 | 1,374 |
| Elmore | 1,020 | 3,974 |
| Franklin | 431 | 2,669 |
| Fremont | 674 | 3,086 |
| Gem | 1,150 | 3,858 |
| Gooding | 824 | 3,035 |
| Idaho | 1,006 | 4,863 |
| Jefferson | 921 | 5,536 |
| Jerome | 719 | 3,577 |
| Kootenai | 7,940 | 21,845 |
| Latah | 3,573 | 6,604 |
| Lemhi | 626 | 2,567 |
| Lewis | 277 | 961 |
| Lincoln | 225 | 1,022 |
| Madison | 871 | 5,943 |
| Minidoka | 1,062 | 3,967 |
| Nez Perce | 3,592 | 7,659 |
| Oneida | 149 | 1,048 |
| Owyhee | 385 | 2,135 |
| Payette | 938 | 4,347 |
| Power | 389 | 1,726 |
| Shoshone | 1,398 | 2,344 |
| Teton | 546 | 1,456 |
| Twin Falls | 3,146 | 13,717 |
| Valley | 686 | 2,365 |
| Washington | 431 | 2,543 |
| TOTAL | 86,437 | 297,189 |
| Plurality | 210,752 | |
| Percentage | 22.5% | 77.5% |