2016 United States Senate election in Idaho
The 2016 United States Senate election in Idaho was held November 8, 2016, to elect a member of the United States Senate to represent the State of Idaho, concurrently with the 2016 [United States presidential election|2016 U.S. presidential election], as well as other elections to the United States Senate in other states and elections to the United States House of Representatives and various state and local elections. The primaries were held May 17.
Incumbent Republican Senator Mike Crapo won re-election to a fourth term in office.
Republican primary
Candidates
Declared
- Mike Crapo, incumbent U.S. Senator
Declined
- Russ Fulcher, former state senator and candidate for governor in 2014
- Raúl Labrador, U.S. Representative
- Mike Simpson, U.S. Representative
Democratic primary
Candidates
Declared
- Jerry Sturgill, businessman
Declined
- Richard H. Stallings, former U.S. Representative, former chairman of the Idaho Democratic Party and nominee for U.S. Senate in 1992 [United States Senate election in Idaho|1992]
- Larry LaRocco, former U.S. Representative, nominee for lieutenant governor in 2006 and nominee for U.S. Senate in 2008
- Walt Minnick, former U.S. Representative and nominee for U.S. Senate in 1996
Third Party and Independent Candidates
Constitution Party
Declared
- Pro-Life, organic strawberry farmer, anti-abortion activist and perennial candidate
- Ray Writz
Independents
Candidates
Withdrawn
- Timothy Raty, paralegal and 2004 Libertarian State House candidate
General election
Polling
| Poll source | Date administered | Sample size | Margin of error | Mike Crapo | Jerry Sturgill | Ray Writz | Other | Undecided |
| SurveyMonkey | November 1–7, 2016 | 612 | ± 4.6% | 58% | 39% | — | — | 3% |
| SurveyMonkey | October 31–November 6, 2016 | 557 | ± 4.6% | 58% | 36% | — | — | 4% |
| SurveyMonkey | October 28–November 3, 2016 | 498 | ± 4.6% | 61% | 35% | — | — | 4% |
| SurveyMonkey | October 27–November 2, 2016 | 442 | ± 4.6% | 60% | 34% | — | — | 6% |
| SurveyMonkey | October 26–November 1, 2016 | 394 | ± 4.6% | 61% | 32% | — | — | 7% |
| SurveyMonkey | October 25–31, 2016 | 447 | ± 4.6% | 61% | 34% | — | — | 5% |
| Emerson College | October 21–23, 2016 | 1,023 | ± 3.0% | 57% | 24% | — | 12% | 7% |
| Dan Jones & Associates | August 18–31, 2016 | 602 | ± 4.0% | 57% | 20% | 4% | 4% | 15% |
| Dan Jones & Associates | July 5–16, 2016 | 601 | ± 4.0% | 57% | 20% | 4% | 4% | 15% |
| Lake Research Partners | July 5–10, 2016 | 500 | ± 4.4% | 37% | 35% | 2% | — | 25% |
| Dan Jones & Associates | May 18–June 4, 2016 | 603 | ± 4.0% | 48% | 25% | 7% | 9% | 10% |
| Dan Jones & Associates | April 8–19, 2016 | 603 | ± 4.0% | 53% | 17% | 5% | 5% | 20% |
Results
Counties that flipped from Republican to Democratic
By congressional district
Crapo won both congressional districts.| District | Crapo | Sturgill | Representative |
| 69% | 25% | Raúl Labrador | |
| 63% | 30% | Mike Simpson |